Section 21A of the Special Marriage Act, 1954 deals with:

Section 21A is headed "Special provision in certain cases": where both parties profess the Hindu, Buddhist, Sikh or Jaina religion, sections 19 and 21 do not apply, nor does so much of section 20 as creates a disability. Succession generally is in section 21, and severance from the undivided family in section 19.