Section 297.5 is a single equivalence rule applied across the whole of California law. Subdivision (a) provides that registered domestic partners have the same rights, protections and benefits, and are subject to the same responsibilities, obligations and duties, whether deriving from statutes, administrative regulations, court rules, government policies, common law or any other source of law, as are granted to and imposed upon spouses. Subdivision (b) does the same for former registered domestic partners by reference to former spouses, and subdivision (c) for a surviving partner by reference to a widow or widower.
The consequences follow automatically rather than section by section. Community property under § 760, separate property under § 770, the fiduciary duties between partners, the requirement that both join in dealing with community real property under § 1102, and equal division under § 2550 all apply, because each of those speaks of spouses and this section makes partners spouses for that purpose. Subdivision (d) applies the same equivalence to the rights and obligations of the partners with respect to a child of either of them. Subdivision (f) covers non-discrimination, and subdivision (g) bars public agencies from discriminating on the ground that a person is a registered domestic partner rather than a spouse.
Subdivision (e) addresses the awkward part: where California law adopts, refers to or relies on federal law in a way that would otherwise cause partners to be treated differently from spouses, California law treats registered domestic partners as if federal law recognised the partnership in the same manner as California law does. That deals with California's own rules; it does not change federal law itself, which is the practical limit of the section. Ending a registered domestic partnership follows the dissolution machinery, and how these rules apply to a particular partnership is a question for a family lawyer.