(1)Mae adran 42 o Ddeddf Henebion Hynafol ac Ardaloedd Archaeolegol 1979 (p.46) (cyfyngiadau ar y defnydd o ddatgelyddion metel) wedi ei diwygio fel a ganlyn.
(2)Yn is-adran (7), ar ôl “an offence under subsection (1) or (3) above” mewnosoder “relating to a protected place situated in England”.
(3)Ar ôl yr is-adran honno mewnosoder—
“(8)In proceedings for an offence under subsection (1) or (3) relating to a protected place situated in Wales, it is a defence for the accused to prove that the accused—
(a)had taken all reasonable steps to find out whether the place in which the metal detector was used was a protected place; and
(b)did not know, and had no reason to believe, that the place was a protected place.”