Are there any limitations on the retroactive effect of directions given under sub-paragraph (1) of this paragraph?
(a) The first sentence is about Acts of the Legislature of the State of Assam not applying to autonomous districts or regions unless directed by the District Council, which can modify the Act as it sees fit.

(b) The second sentence is about the Governor being able to give directions that an Act doesn't apply or applies with exceptions and modifications to autonomous districts or regions in the State of Assam.

(c) The paragraph labeled "3[12A." starts with "Notwithstanding anything in this Constitution," which means it can override any other provision. It is about Acts of Parliament and the Legislature of Meghalaya not applying to autonomous districts or regions unless directed by the Governor, who can modify the Act as he sees fit.

327: There are no explicit limitations on retroactive effect of directions given under sub-paragraph (1) of this paragraph.