Ar hyn o bryd nid oes unrhyw effeithiau heb eu gweithredu yn hysbys ar gyfer y Deddf Cynllunio (Cymru) 2015, Croes Bennawd: Cyffredinol.
Am ddiwygiadau pellach sy’n ymwneud â chynllunio datblygu, gweler Atodlen 2.
Gwybodaeth Cychwyn
I1A. 16 mewn grym ar 6.9.2015 at ddibenion penodedig, gweler a. 58(2)(b)
I2A. 16 mewn grym ar 4.12.2020 i'r graddau nad yw eisoes mewn grym gan O.S. 2020/1216, ergl. 2(a)
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