THE INDIAN CHRISTIAN MARRIAGE ACT, 1872;3,19,44,66,81,82,88
THE SPECIAL MARRIAGE ACT, 1872
2;(4) the parties must not be related to each other in any degree of consanguinity or affinity which would, according to any law to which either of them is subject, render a marriage between them illegal.
Central Government Act
The Special Marriage Act, 1954;2(b), 4(d)
THE FIRST SCHEDULE (See Sec.2 (b)) Degree of Prohibited Relationship