3. Yn adran 70 o Ddeddf 1972(1)) (gwaharddiad ar hybu mesurau ar gyfer newid ardaloedd llywodraeth leol), ychwanegwch ar y diwedd—
“(3) No local authority or joint authority shall have power to promote a Bill for forming, altering or abolishing executive arrangements or alternative arrangements, or for altering arrangements for electing an elected mayor.”.
Diwygiwyd adran 70 gan baragraff 1 o Atodlen 14 i Ddeddf Llywodraeth Leol 1985 (p.51), paragraff 41 o Atolden 12 ac Aodlen 13 i Ddeddf Diwygio Addysg 1988 (p.40).