<Legislation xmlns="http://www.legislation.gov.uk/namespaces/legislation" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6" NumberOfProvisions="246" xsi:schemaLocation="http://www.legislation.gov.uk/namespaces/legislation http://www.legislation.gov.uk/schema/legislation.xsd" SchemaVersion="1.0" xml:lang="cy" RestrictExtent="E+W" RestrictStartDate="2025-09-19"><ukm:Metadata xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dct="http://purl.org/dc/terms/" xmlns:atom="http://www.w3.org/2005/Atom" xmlns:ukm="http://www.legislation.gov.uk/namespaces/metadata">
					<dc:identifier>http://www.legislation.gov.uk/anaw/2016/6/section/139/welsh</dc:identifier><dc:title>Deddf Casglu a Rheoli Trethi (Cymru) 2016</dc:title><dc:language>cy</dc:language><dc:publisher>Statute Law Database</dc:publisher><dc:modified>2026-05-12</dc:modified><dc:contributor>Expert Participation</dc:contributor><dct:valid>2025-09-19</dct:valid>
					
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									<ukm:Notes><ukm:Note IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/section/139/notes" DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/section/139/notes/welsh"/><ukm:Alternatives><ukm:Alternative URI="http://www.legislation.gov.uk/anaw/2016/6/pdfs/anawen_20160006_we.pdf" Date="2016-04-28" Title="Explanatory Note" Size="2008415" Language="Welsh"/><ukm:Alternative URI="http://www.legislation.gov.uk/anaw/2016/6/pdfs/anawen_20160006_mi.pdf" Date="2016-04-28" Title="Explanatory Note" Size="7453078" Language="Mixed"/><ukm:Alternative URI="http://www.legislation.gov.uk/anaw/2016/6/pdfs/anawen_20160006_en.pdf" Date="2016-04-28" Title="Explanatory Note" Size="1965172"/></ukm:Alternatives>       
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				</ukm:Metadata><Primary><Body DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/body/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/body" NumberOfProvisions="246" NumberFormat="default" RestrictExtent="E+W" RestrictStartDate="2025-09-19"><Part DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/part/5/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/part/5" NumberOfProvisions="55" id="part-5" RestrictExtent="E+W" RestrictStartDate="2025-09-19"><Number>RHAN 5</Number><Title>COSBAU</Title><Chapter DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/part/5/chapter/3/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/part/5/chapter/3" NumberOfProvisions="14" id="part-5-chapter-3" RestrictExtent="E+W" RestrictStartDate="2025-09-19"><Number>PENNOD 3</Number><Title>COSBAU AM ANGHYWIRDEBAU</Title><Pblock DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/part/5/chapter/3/crossheading/cosbau-o-dan-bennod-3-cyffredinol/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/part/5/chapter/3/crossheading/cosbau-o-dan-bennod-3-cyffredinol" NumberOfProvisions="3" id="part-5-chapter-3-crossheading-cosbau-o-dan-bennod-3-cyffredinol" RestrictExtent="E+W" RestrictStartDate="2025-09-19"><Title>Cosbau o dan Bennod 3: cyffredinol</Title><P1group RestrictExtent="E+W" RestrictStartDate="2025-09-19"><Title>Gostwng cosb o dan Bennod 3 am ddatgelu</Title><P1 DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/section/139/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/section/139" id="section-139"><Pnumber><CommentaryRef Ref="key-8fbfb19dc7d34c2ce5061f02287d55e5"/><CommentaryRef Ref="key-dc0d12d51f0116dfdcdd2b165e6018aa"/>139</Pnumber><P1para><P2 DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/section/139/1/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/section/139/1" id="section-139-1"><Pnumber>1</Pnumber><P2para><Text>Caiff <Abbreviation Expansion="Awdurdod Cyllid Cymru">ACC</Abbreviation> ostwng cosb sy’n daladwy o dan y Bennod hon pan fo person yn gwneud datgeliad cymwys.</Text></P2para></P2><P2 DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/section/139/2/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/section/139/2" id="section-139-2"><Pnumber>2</Pnumber><P2para><Text>Ystyr “datgeliad cymwys” yw datgelu—</Text><P3 DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/section/139/2/a/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/section/139/2/a" id="section-139-2-a"><Pnumber>a</Pnumber><P3para><Text>anghywirdeb sy’n berthnasol i rwymedigaeth person i dreth  <Substitution ChangeId="key-fff3af6ed431e746ec4d55fe1114ea14-1776770263001" CommentaryRef="key-fff3af6ed431e746ec4d55fe1114ea14">a gesglir gan ACC</Substitution>,</Text></P3para></P3><P3 DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/section/139/2/b/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/section/139/2/b" id="section-139-2-b"><Pnumber>b</Pnumber><P3para><Text>bod gwybodaeth ffug wedi ei darparu, neu wybodaeth wedi ei hatal, sy’n berthnasol i rwymedigaeth person i dreth  <Substitution ChangeId="key-fff3af6ed431e746ec4d55fe1114ea14-1776770288766" CommentaryRef="key-fff3af6ed431e746ec4d55fe1114ea14">a gesglir gan ACC</Substitution>, <CommentaryRef Ref="key-4f4aa4a8374f6fc1302d3944a16dcd78"/>...</Text></P3para></P3><P3 DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/section/139/2/c/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/section/139/2/c" id="section-139-2-c"><Pnumber>c</Pnumber><P3para><Text>methiant i ddatgelu tanasesiad mewn cysylltiad â threth  <Substitution ChangeId="key-fff3af6ed431e746ec4d55fe1114ea14-1776770307647" CommentaryRef="key-fff3af6ed431e746ec4d55fe1114ea14">a gesglir gan ACC</Substitution>,</Text></P3para></P3><P3 DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/section/139/2/d/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/section/139/2/d" id="section-139-2-d"><Pnumber><Addition ChangeId="key-54a5568d85d0b879033d1b5ec5230a1f-1676030293633" CommentaryRef="key-54a5568d85d0b879033d1b5ec5230a1f">d</Addition></Pnumber><P3para><Text><Addition ChangeId="key-54a5568d85d0b879033d1b5ec5230a1f-1676030293633" CommentaryRef="key-54a5568d85d0b879033d1b5ec5230a1f">anghywirdeb sy’n berthnasol i hawlogaeth person i gredyd treth neu atebolrwydd person i dalu swm mewn cysylltiad â chredyd treth,</Addition></Text></P3para></P3><P3 DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/section/139/2/e/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/section/139/2/e" id="section-139-2-e"><Pnumber><Addition ChangeId="key-54a5568d85d0b879033d1b5ec5230a1f-1676030293633" CommentaryRef="key-54a5568d85d0b879033d1b5ec5230a1f">e</Addition></Pnumber><P3para><Text><Addition ChangeId="key-54a5568d85d0b879033d1b5ec5230a1f-1676030293633" CommentaryRef="key-54a5568d85d0b879033d1b5ec5230a1f">bod gwybodaeth ffug wedi ei darparu, neu wybodaeth wedi ei hatal, sy’n berthnasol i hawlogaeth person i gredyd treth neu atebolrwydd person i dalu swm mewn cysylltiad â chredyd treth, neu</Addition></Text></P3para></P3><P3 DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/section/139/2/f/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/section/139/2/f" id="section-139-2-f"><Pnumber><Addition ChangeId="key-54a5568d85d0b879033d1b5ec5230a1f-1676030293633" CommentaryRef="key-54a5568d85d0b879033d1b5ec5230a1f">f</Addition></Pnumber><P3para><Text><Addition ChangeId="key-54a5568d85d0b879033d1b5ec5230a1f-1676030293633" CommentaryRef="key-54a5568d85d0b879033d1b5ec5230a1f">methiant i ddatgelu tanasesiad mewn cysylltiad ag atebolrwydd person i dalu swm mewn cysylltiad â chredyd treth.</Addition></Text></P3para></P3></P2para></P2><P2 DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/section/139/3/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/section/139/3" id="section-139-3"><Pnumber>3</Pnumber><P2para><Text>Mae person yn gwneud datgeliad cymwys drwy—</Text><P3 DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/section/139/3/a/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/section/139/3/a" id="section-139-3-a"><Pnumber>a</Pnumber><P3para><Text>dweud wrth ACC amdano,</Text></P3para></P3><P3 DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/section/139/3/b/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/section/139/3/b" id="section-139-3-b"><Pnumber>b</Pnumber><P3para><Text>rhoi cymorth rhesymol i ACC wrth feintioli—</Text><P4 DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/section/139/3/b/i/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/section/139/3/b/i" id="section-139-3-b-i"><Pnumber>i</Pnumber><P4para><Text>yr anghywirdeb,</Text></P4para></P4><P4 DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/section/139/3/b/ii/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/section/139/3/b/ii" id="section-139-3-b-ii"><Pnumber>ii</Pnumber><P4para><Text>yr anghywirdeb sydd i’w briodoli i ddarparu gwybodaeth ffug neu gelu gwybodaeth, neu</Text></P4para></P4><P4 DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/section/139/3/b/iii/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/section/139/3/b/iii" id="section-139-3-b-iii"><Pnumber>iii</Pnumber><P4para><Text>y tanasesiad, ac</Text></P4para></P4></P3para></P3><P3 DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/section/139/3/c/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/section/139/3/c" id="section-139-3-c"><Pnumber>c</Pnumber><P3para><Text>caniatáu i ACC weld cofnodion at ddiben sicrhau bod—</Text><P4 DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/section/139/3/c/i/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/section/139/3/c/i" id="section-139-3-c-i"><Pnumber>i</Pnumber><P4para><Text>yr anghywirdeb,</Text></P4para></P4><P4 DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/section/139/3/c/ii/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/section/139/3/c/ii" id="section-139-3-c-ii"><Pnumber>ii</Pnumber><P4para><Text>yr anghywirdeb sydd i’w briodoli i ddarparu gwybodaeth ffug neu atal gwybodaeth, neu</Text></P4para></P4><P4 DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/section/139/3/c/iii/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/section/139/3/c/iii" id="section-139-3-c-iii"><Pnumber>iii</Pnumber><P4para><Text>y tanasesiad,</Text></P4para></P4><Text>yn cael ei gywiro’n llawn.</Text></P3para></P3></P2para></P2><P2 DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/section/139/4/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/section/139/4" id="section-139-4"><Pnumber>4</Pnumber><P2para><Text>Wrth ostwng cosb o dan yr adran hon, caiff ACC ystyried—</Text><P3 DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/section/139/4/a/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/section/139/4/a" id="section-139-4-a"><Pnumber>a</Pnumber><P3para><Text>pa un a oedd y datgeliad wedi ei gymell neu’n ddigymell, a</Text></P3para></P3><P3 DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/section/139/4/b/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/section/139/4/b" id="section-139-4-b"><Pnumber>b</Pnumber><P3para><Text>ansawdd y datgeliad.</Text></P3para></P3></P2para></P2><P2 DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/section/139/5/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/section/139/5" id="section-139-5"><Pnumber>5</Pnumber><P2para><Text>Mae datgelu gwybodaeth berthnasol—</Text><P3 DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/section/139/5/a/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/section/139/5/a" id="section-139-5-a"><Pnumber>a</Pnumber><P3para><Text>yn “ddigymell” os caiff ei wneud ar adeg pan nad oes gan y person sy’n datgelu unrhyw reswm i gredu bod ACC wedi darganfod neu ar fin darganfod yr anghywirdeb, bod gwybodaeth ffug wedi ei darparu neu bod gwybodaeth wedi ei hatal, neu’r tanasesiad, a</Text></P3para></P3><P3 DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/section/139/5/b/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/section/139/5/b" id="section-139-5-b"><Pnumber>b</Pnumber><P3para><Text>fel arall, “wedi ei gymell”.</Text></P3para></P3></P2para></P2><P2 DocumentURI="http://www.legislation.gov.uk/anaw/2016/6/section/139/6/welsh" IdURI="http://www.legislation.gov.uk/id/anaw/2016/6/section/139/6" id="section-139-6"><Pnumber>6</Pnumber><P2para><Text>Mae “ansawdd”, mewn perthynas â datgelu, yn cynnwys amseriad, natur a graddau.</Text></P2para></P2></P1para></P1></P1group></Pblock></Chapter></Part></Body></Primary><Commentaries><Commentary id="key-4f4aa4a8374f6fc1302d3944a16dcd78" Type="F"><Para><Text>Gair yn <CitationSubRef id="cvapayp64-02056" SectionRef="section-139-2" URI="http://www.legislation.gov.uk/id/anaw/2016/6/section/139/2">a. 139(2)</CitationSubRef> wedi ei hepgor (1.4.2018) yn rhinwedd <Citation URI="http://www.legislation.gov.uk/id/wsi/2018/101" id="cvapayp64-02057" Title="Rheoliadau Treth Gwarediadau Tirlenwi (Gweinyddu) (Cymru) 2018" Class="UnitedKingdomStatutoryInstrument" Year="2018" Number="101">Rheoliadau Treth Gwarediadau Tirlenwi (Gweinyddu) (Cymru) 2018 (O.S. 2018/101)</Citation>, <CitationSubRef CitationRef="cvapayp64-02057" id="cvapayp64-02058" SectionRef="regulation-1-2" URI="http://www.legislation.gov.uk/id/wsi/2018/101/regulation/1/2">rhl. 1(2)</CitationSubRef>, <CitationSubRef CitationRef="cvapayp64-02057" id="cvapayp64-02059" SectionRef="schedule-paragraph-34-a" URI="http://www.legislation.gov.uk/id/wsi/2018/101/schedule/paragraph/34/a" Operative="true">Atod. para. 34(a)</CitationSubRef></Text></Para></Commentary><Commentary id="key-54a5568d85d0b879033d1b5ec5230a1f" Type="F"><Para><Text><CitationSubRef id="cvapayp64-00033" StartSectionRef="section-139-2-d" EndSectionRef="section-139-2-f" URI="http://www.legislation.gov.uk/id/anaw/2016/6/section/139/2/d" UpTo="http://www.legislation.gov.uk/id/anaw/2016/6/section/139/2/f">A. 139(2)(d)-(f)</CitationSubRef> wedi ei fewnosod (1.4.2018) gan <Citation URI="http://www.legislation.gov.uk/id/wsi/2018/101" id="cvapayp64-00034" Title="Rheoliadau Treth Gwarediadau Tirlenwi (Gweinyddu) (Cymru) 2018" Class="UnitedKingdomStatutoryInstrument" Year="2018" Number="101">Rheoliadau Treth Gwarediadau Tirlenwi (Gweinyddu) (Cymru) 2018 (O.S. 2018/101)</Citation>, <CitationSubRef CitationRef="cvapayp64-00034" id="cvapayp64-00035" SectionRef="regulation-1-2" URI="http://www.legislation.gov.uk/id/wsi/2018/101/regulation/1/2">rhl. 1(2)</CitationSubRef>, <CitationSubRef CitationRef="cvapayp64-00034" id="cvapayp64-00036" SectionRef="schedule-paragraph-34-b" URI="http://www.legislation.gov.uk/id/wsi/2018/101/schedule/paragraph/34/b" Operative="true">Atod. para. 34(b)</CitationSubRef></Text></Para></Commentary><Commentary Type="I" id="key-8fbfb19dc7d34c2ce5061f02287d55e5"><Para><Text>A. 139  ddim mewn grym ar y Cydsyniad Brenhinol, gweler <CitationSubRef id="n466ab3b686dab799" SectionRef="section-194-2" URI="http://www.legislation.gov.uk/id/anaw/2016/6/section/194/2" Operative="true">a. 194(2)</CitationSubRef></Text></Para></Commentary><Commentary id="key-dc0d12d51f0116dfdcdd2b165e6018aa" Type="I"><Para><Text><CitationSubRef id="cvapayp64-03148" SectionRef="section-139" URI="http://www.legislation.gov.uk/id/anaw/2016/6/section/139">A. 139</CitationSubRef> mewn grym ar 1.4.2018 gan <Citation URI="http://www.legislation.gov.uk/id/wsi/2018/33" id="cvapayp64-03149" Title="Gorchymyn Deddf Casglu a Rheoli Trethi (Cymru) 2016 (Cychwyn Rhif 2) 2018" Class="UnitedKingdomStatutoryInstrument" Year="2018" Number="33">O.S. 2018/33</Citation>, <CitationSubRef CitationRef="cvapayp64-03149" id="cvapayp64-03150" SectionRef="article-3" URI="http://www.legislation.gov.uk/id/wsi/2018/33/article/3" Operative="true">ergl. 3</CitationSubRef></Text></Para></Commentary><Commentary id="key-fff3af6ed431e746ec4d55fe1114ea14" Type="F"><Para><Text>Gair yn <CitationSubRef id="c4v9oz606-00015" SectionRef="introduction" URI="http://www.legislation.gov.uk/id/anaw/2016/6">Deddf</CitationSubRef> wedi ei amnewid (19.9.2025) gan <Citation URI="http://www.legislation.gov.uk/id/asc/2025/5" id="c4v9oz606-00016" Title="Deddf Llety Ymwelwyr (Cofrestr ac Ardoll) Etc. (Cymru) 2025" Class="WelshParliamentAct" Year="2025" Number="5">Deddf Llety Ymwelwyr (Cofrestr ac Ardoll) Etc. (Cymru) 2025 (asc 5)</Citation>, <CitationSubRef CitationRef="c4v9oz606-00016" id="c4v9oz606-00017" SectionRef="section-67-1" URI="http://www.legislation.gov.uk/id/asc/2025/5/section/67/1">a. 67(1)</CitationSubRef>, <CitationSubRef CitationRef="c4v9oz606-00016" id="c4v9oz606-00018" SectionRef="schedule-2-paragraph-21" URI="http://www.legislation.gov.uk/id/asc/2025/5/schedule/2/paragraph/21" Operative="true">Atod. 2 para. 21</CitationSubRef></Text></Para></Commentary></Commentaries></Legislation>