Notwithstanding any other provision of law, the Los Angeles County Metropolitan Transportation Authority shall assume the duties, obligations, and liabilities of the Southern California Rapid Transit District, including those duties, obligations, and liabilities arising from or relating to collective bargaining agreements or labor obligations imposed by state or federal law, only to the extent that the authority is acting pursuant to specific duties, obligations, liabilities, rights, or powers to which it succeeded as a result of the abolishment of the district pursuant to Section 130051.13.