Notwithstanding Sections 2500 to 2506, inclusive:
(a) Whenever another statute requires, provides a procedure for, or dispenses with court approval of a compromise, settlement, extension, renewal, or modification, the provisions of that statute govern any case to which that statute applies.
(b) Whenever another statute provides that a compromise or settlement of an administrative proceeding is not valid unless approved in such proceeding, the approval is governed by that statute, and approval in the guardianship or conservatorship proceeding is not required.