<akomaNtoso xmlns:uk="https://www.legislation.gov.uk/namespaces/UK-AKN" xmlns:ukl="http://www.legislation.gov.uk/namespaces/legislation" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://docs.oasis-open.org/legaldocml/ns/akn/3.0" xsi:schemaLocation="http://docs.oasis-open.org/legaldocml/ns/akn/3.0 http://docs.oasis-open.org/legaldocml/akn-core/v1.0/cos01/part2-specs/schemas/akomantoso30.xsd"><act name="asc"><meta><identification source="#"><FRBRWork><FRBRthis value="http://www.legislation.gov.uk/id/asc/2026/4"/><FRBRuri value="http://www.legislation.gov.uk/id/asc/2026/4"/><FRBRdate date="2026-04-27" name="enacted"/><FRBRauthor href="http://www.legislation.gov.uk/id/legislature/WelshParliament"/><FRBRcountry value="GB-UKM"/><FRBRnumber value="4"/><FRBRname value="2026 c. 4"/><FRBRprescriptive value="true"/></FRBRWork><FRBRExpression><FRBRthis value="http://www.legislation.gov.uk/asc/2026/4/2026-04-28"/><FRBRuri value="http://www.legislation.gov.uk/asc/2026/4/2026-04-28"/><FRBRdate date="2026-04-28" name="validFrom"/><FRBRauthor href="#"/><FRBRlanguage language="cym"/></FRBRExpression><FRBRManifestation><FRBRthis value="http://www.legislation.gov.uk/asc/2026/4/2026-04-28/data.akn"/><FRBRuri value="http://www.legislation.gov.uk/asc/2026/4/2026-04-28/data.akn"/><FRBRdate date="2026-08-11+01:00" name="transform"/><FRBRauthor href="http://www.legislation.gov.uk"/><FRBRformat value="application/akn+xml"/></FRBRManifestation></identification><lifecycle source="#"><eventRef refersTo="#enactment" date="2026-04-27" eId="date-enacted" source="#"/><eventRef date="2026-04-28" eId="date-2026-04-28" source="#"/></lifecycle><analysis source="#"><restrictions source="#"><restriction refersTo="#extent-e+w" type="jurisdiction"/><restriction href="#body" refersTo="#extent-e+w" type="jurisdiction"/><restriction href="#part-2" refersTo="#extent-e+w" type="jurisdiction"/><restriction href="#part-2-crossheading-hysbysiadau-cydymffurfio" refersTo="#extent-e+w" type="jurisdiction"/><restriction href="#section-21" refersTo="#extent-e+w" type="jurisdiction"/><restriction refersTo="#period-from-2026-04-28" type="jurisdiction"/><restriction href="#body" refersTo="#period-from-2026-04-28" type="jurisdiction"/></restrictions><otherAnalysis source=""><uk:status href="#part-2" refersTo="#status-prospective"/><uk:status href="#part-2-crossheading-hysbysiadau-cydymffurfio" refersTo="#status-prospective"/><uk:status href="#section-21" refersTo="#status-prospective"/><uk:match href="#part-2" value="false"/><uk:match href="#part-2-crossheading-hysbysiadau-cydymffurfio" value="false"/><uk:match href="#section-21" value="false"/><uk:commentary href="#section-21" refersTo="#key-2d2bf765c23fac6fe1501e039b984381"/></otherAnalysis></analysis><temporalData source="#"><temporalGroup eId="period-from-2026-04-28"><timeInterval start="#date-2026-04-28" refersTo="#"/></temporalGroup></temporalData><references source="#"><TLCEvent eId="enactment" href="" showAs="EnactmentDate"/><TLCLocation eId="extent-e+w" href="/ontology/jurisdictions/uk.EnglandWales" showAs="E+W"/><TLCConcept eId="status-prospective" href="" showAs="Prospective"/></references><notes source="#"><note ukl:Name="Commentary" ukl:Type="I" class="commentary I" eId="key-2d2bf765c23fac6fe1501e039b984381" marker="I1"><p>A. 21  mewn grym ar 27.4.2028 (yn amodol na fydd diwrnod cynharach yn cael ei benodi gan Weinidogion Cymru), gweler <ref eId="n2868800646df11b0" class="subref operative" href="http://www.legislation.gov.uk/id/asc/2026/4/section/46/4/5">a. 46(4)(5)</ref>(6)(c)</p></note></notes><proprietary xmlns:ukm="http://www.legislation.gov.uk/namespaces/metadata" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dct="http://purl.org/dc/terms/" source="#"><dc:identifier>http://www.legislation.gov.uk/asc/2026/4/section/21/welsh</dc:identifier><dc:title>Deddf yr Amgylchedd (Egwyddorion, Llywodraethiant a Thargedau Bioamrywiaeth) (Cymru) 2026</dc:title><dc:language>cy</dc:language><dc:modified>2026-07-27</dc:modified><dc:publisher>Statute Law Database</dc:publisher><dct:valid>2026-04-28</dct:valid><ukm:PrimaryMetadata><ukm:DocumentClassification><ukm:DocumentCategory Value="primary"/><ukm:DocumentMainType Value="WelshParliamentAct"/><ukm:DocumentStatus Value="revised"/></ukm:DocumentClassification><ukm:Year Value="2026"/><ukm:Number Value="4"/><ukm:EnactmentDate Date="2026-04-27"/><ukm:ISBN Value="9780348113983"/><ukm:UnappliedEffects><ukm:UnappliedEffect RequiresApplied="true" RequiresWelshApplied="true" AffectingYear="2026" AffectedClass="WelshParliamentAct" URI="http://www.legislation.gov.uk/id/effect/key-4f2cbde61b6e60a6bd05a2f9ffa5547a" AffectedYear="2026" AffectingProvisions="s. 46(4)(5)(6)(c)" AffectedURI="http://www.legislation.gov.uk/id/asc/2026/4" Row="22" Type="coming into force" AffectedNumber="4" AffectedExtent="E+W" AffectedProvisions="s. 21" AffectingURI="http://www.legislation.gov.uk/id/asc/2026/4" EffectId="key-4f2cbde61b6e60a6bd05a2f9ffa5547a" AffectingNumber="4" AffectedTerritorialApplication="W" AffectingClass="WelshParliamentAct" Created="2026-06-17T12:08:45Z"><ukm:AffectedTitle>Environment (Principles, Governance and Biodiversity Targets) (Wales) Act 2026</ukm:AffectedTitle><ukm:AffectedTitle xml:lang="cy">Deddf yr Amgylchedd (Egwyddorion, Llywodraethiant a Thargedau Bioamrywiaeth) (Cymru) 2026</ukm:AffectedTitle><ukm:AffectedProvisions><ukm:Section Ref="section-21" URI="http://www.legislation.gov.uk/id/asc/2026/4/section/21">s. 21</ukm:Section></ukm:AffectedProvisions><ukm:AffectingTitle>Environment (Principles, Governance and Biodiversity Targets) (Wales) Act 2026</ukm:AffectingTitle><ukm:AffectingTitle xml:lang="cy">Deddf yr Amgylchedd (Egwyddorion, Llywodraethiant a Thargedau Bioamrywiaeth) (Cymru) 2026</ukm:AffectingTitle><ukm:AffectingProvisions><ukm:Section Ref="section-46-4" URI="http://www.legislation.gov.uk/id/asc/2026/4/section/46/4">s. 46(4)</ukm:Section><ukm:Section Ref="section-46-5" URI="http://www.legislation.gov.uk/id/asc/2026/4/section/46/5">(5)</ukm:Section><ukm:Section Ref="section-46-6-c" URI="http://www.legislation.gov.uk/id/asc/2026/4/section/46/6/c">s. 46(6)(c)</ukm:Section></ukm:AffectingProvisions><ukm:InForceDates><ukm:InForce Applied="false" WelshApplied="false" Date="2028-04-27" Qualification="other" OtherQualification="(conditional on an earlier day not being appointed by Welsh Ministers)"/></ukm:InForceDates></ukm:UnappliedEffect><ukm:UnappliedEffect URI="http://www.legislation.gov.uk/id/effect/key-2d2bf765c23fac6fe1501e039b984381" AffectingNumber="4" AffectedNumber="4" AffectedProvisions="s. 21" Created="2026-08-07T08:51:30Z" AffectedTerritorialApplication="W" AffectedExtent="E+W" EffectId="key-2d2bf765c23fac6fe1501e039b984381" RequiresApplied="true" AffectingClass="WelshParliamentAct" Type="coming into force" RequiresWelshApplied="true" AffectedYear="2026" AffectedURI="http://www.legislation.gov.uk/id/asc/2026/4" AffectingYear="2026" Row="22" AffectingURI="http://www.legislation.gov.uk/id/asc/2026/4" AffectedClass="WelshParliamentAct" AffectingProvisions="s. 46(4)(5)(6)(c)"><ukm:AffectedTitle>Environment (Principles, Governance and Biodiversity Targets) (Wales) Act 2026</ukm:AffectedTitle><ukm:AffectedTitle xml:lang="cy">Deddf yr Amgylchedd (Egwyddorion, Llywodraethiant a Thargedau Bioamrywiaeth) (Cymru) 2026</ukm:AffectedTitle><ukm:AffectedProvisions><ukm:Section Ref="section-21" URI="http://www.legislation.gov.uk/id/asc/2026/4/section/21">s. 21</ukm:Section></ukm:AffectedProvisions><ukm:AffectingTitle>Environment (Principles, Governance and Biodiversity Targets) (Wales) Act 2026</ukm:AffectingTitle><ukm:AffectingTitle xml:lang="cy">Deddf yr Amgylchedd (Egwyddorion, Llywodraethiant a Thargedau Bioamrywiaeth) (Cymru) 2026</ukm:AffectingTitle><ukm:AffectingProvisions><ukm:Section Ref="section-46-4" URI="http://www.legislation.gov.uk/id/asc/2026/4/section/46/4">s. 46(4)</ukm:Section><ukm:Section Ref="section-46-5" URI="http://www.legislation.gov.uk/id/asc/2026/4/section/46/5">(5)</ukm:Section><ukm:Section Ref="section-46-6-c" URI="http://www.legislation.gov.uk/id/asc/2026/4/section/46/6/c">s. 46(6)(c)</ukm:Section></ukm:AffectingProvisions><ukm:InForceDates><ukm:InForce Applied="true" WelshApplied="false" Date="2028-04-27" Qualification="other" OtherQualification="(yn amodol na fydd diwrnod cynharach yn cael ei benodi gan Weinidogion Cymru)"/></ukm:InForceDates></ukm:UnappliedEffect></ukm:UnappliedEffects></ukm:PrimaryMetadata><ukm:Alternatives><ukm:Alternative URI="http://www.legislation.gov.uk/asc/2026/4/pdfs/asc_20260004_we.pdf" Date="2026-05-11" Size="2476535" Language="Welsh" Print="false"/><ukm:Alternative URI="http://www.legislation.gov.uk/asc/2026/4/pdfs/asc_20260004_en.pdf" Date="2026-05-11" Size="2493561" Print="false"/><ukm:Alternative URI="http://www.legislation.gov.uk/asc/2026/4/pdfs/asc_20260004_mi.pdf" Date="2026-05-11" Size="3286135" Language="Mixed" Print="true"/></ukm:Alternatives><ukm:Statistics><ukm:TotalParagraphs Value="92"/><ukm:BodyParagraphs Value="58"/><ukm:ScheduleParagraphs Value="34"/><ukm:AttachmentParagraphs Value="0"/><ukm:TotalImages Value="0"/></ukm:Statistics></proprietary></meta><body eId="body"><part eId="part-2"><num>RHAN 2</num><heading>SWYDDFA LLYWODRAETHIANT AMGYLCHEDDOL CYMRU</heading><hcontainer name="crossheading" ukl:Name="Pblock" eId="part-2-crossheading-hysbysiadau-cydymffurfio"><heading>Hysbysiadau cydymffurfio</heading><section eId="section-21" uk:target="true"><num>21</num><heading>Adolygiad yr Uchel Lys ar ôl methiant i gymryd cam gweithredu penodedig</heading><subsection eId="section-21-1"><num>(1)</num><content><p>Mae’r adran hon yn gymwys pan fo SLlAC yn ystyried bod awdurdod cyhoeddus wedi methu â chymryd cam gweithredu a bennir mewn hysbysiad cydymffurfio yn y cyfnod y mae’n ofynnol cymryd y cam gweithredu o’i fewn.</p></content></subsection><subsection eId="section-21-2"><num>(2)</num><intro><p>Caiff SLlAC wneud cais i’r Uchel Lys am orchymyn sy’n ei gwneud yn ofynnol i’r awdurdod cyhoeddus—</p></intro><level class="para1" eId="section-21-2-a"><num>(a)</num><content><p>cymryd y cam gweithredu fel y’i pennir yn yr hysbysiad cydymffurfio, neu</p></content></level><level class="para1" eId="section-21-2-b"><num>(b)</num><content><p>cymryd y cam gweithredu hwnnw fel y’i hamrywir gan y Llys fel y mae’n ystyried ei fod yn briodol.</p></content></level></subsection><subsection eId="section-21-3"><num>(3)</num><intro><p>Ni chaniateir gwneud cais mewn perthynas â cham gweithredu a bennir mewn hysbysiad cydymffurfio nad yw’n hysbysiad cydymffurfio brys cyn y diweddaraf o—</p></intro><level class="para1" eId="section-21-3-a"><num>(a)</num><content><p>diwedd y cyfnod y mae’n ofynnol i’r awdurdod cyhoeddus gymryd y cam gweithredu o’i fewn, a</p></content></level><level class="para1" eId="section-21-3-b"><num>(b)</num><content><p>unrhyw derfyn amser sy’n gymwys i gychwyn adolygiad barnwrol er mwyn cwestiynu’r ymddygiad honedig y cyflwynwyd yr hysbysiad cydymffurfio mewn cysylltiad ag ef.</p></content></level></subsection><subsection eId="section-21-4"><num>(4)</num><content><p>Ni chaniateir gwneud cais mewn perthynas â cham gweithredu a bennir mewn hysbysiad cydymffurfio brys cyn diwedd y cyfnod y mae’n ofynnol i’r awdurdod cyhoeddus gymryd y cam gweithredu o’i fewn.</p></content></subsection><subsection eId="section-21-5"><num>(5)</num><content><p>Rhaid i orchymyn a roddir ar gais o dan is-adran (2) bennu’r cyfnod y mae’n ofynnol cymryd y cam gweithredu o’i fewn.</p></content></subsection><subsection eId="section-21-6"><num>(6)</num><content><p>Os yw’r Llys, wrth benderfynu cais o dan is-adran (2), yn ystyried bod hysbysiad cydymffurfio neu ran o hysbysiad cydymffurfio yn afresymol neu na ddylai, am unrhyw reswm arall, yr hysbysiad fod wedi ei gyflwyno neu’r rhan fod wedi ei chynnwys, rhaid i’r Llys drwy orchymyn ei gwneud yn ofynnol i SLlAC dynnu’r hysbysiad neu (yn ôl y digwydd) y rhan o’r hysbysiad yn ôl.</p></content></subsection></section></hcontainer></part></body></act></akomaNtoso>