Indian Contract Act, 1872
58. Alterative promise, one branch
being illegal
In the case of an alternative promise, one branch of which is
legal and the other illegal, the legal branch alone can be enforced.
Illustration
A and B agree that A shall pay B 1,000 rupees, for which B shall
afterwards deliver to A either rice or smuggled opium.
This is a valid contract to deliver rice, and a void agreement
as to the opium.