(2)
No proceeding may be commenced by a State under paragraph (1)—
(A)
before 30 days after the State has given notice to the Secretary that the State intends to bring such proceeding,
(B)
before 90 days after the State has given notice to the Secretary of such intent if the Secretary has, within such 30 days, commenced an informal or formal enforcement action pertaining to the food which would be the subject of such proceeding, or
(C)
if the Secretary is diligently prosecuting a proceeding in court pertaining to such food, has settled such proceeding, or has settled the informal or formal enforcement action pertaining to such food.
In any court proceeding described in subparagraph (C), a State may intervene as a matter of right.