Mae adran 45C o Ddeddf Iechyd y Cyhoedd (Rheoli Clefydau) 1984 (“Deddf 1984”) yn galluogi Gweinidogion Cymru, drwy reoliadau, i wneud darpariaeth at ddiben atal, diogelu rhag, rheoli neu ddarparu ymateb iechyd y cyhoedd i fynychder neu ledaeniad haint neu halogiad yng Nghymru.
Section 45C of the Public Health (Control of Disease) Act 1984 (‘the 1984 Act’) enables the Welsh Ministers, by regulations, to make provision for the purpose of preventing, protecting against, controlling or providing a public health response to the incidence or spread of infection or contamination in Wales.