You cannot have a labor contract with an employee that is in violation of
the labor law.
Here is an attorney backing up what I am saying about illegal contracts no
being binding:
http://www.denvica.com/contracts.html
Violation of Law
A contract between criminals to commit a criminal act or other acts
violating civil, criminal or any law is illegal and unenforceable.
Illustrations of illegal contracts: gambling or wagering contracts, contract
for services without appropriate licenses or permits, unreasonably broad
(duration, geographical restrictions) non-competition contracts, or lending
contracts made in violation of state usury laws.
and another:
http://en.wikipedia.org/wiki/Contract
2) Escape from contract: A party may in some cases escape obligations
established by a contract for one of the following reasons
Violation of a public policy or illegality
and another:
http://www.attorneys.com/li/legal_topics.cfm?i_Display=2&LN_ID=52
CONTRACTS DEFINED
A contract is an agreement that the law will enforce. Contracts can be oral
or written, although in certain cases, the law requires the contract to be
in writing to be enforceable. The 'Common Law', that is, rules made by
judges in the course of deciding cases (as opposed to statutes enacted by
legislatures) is the source of most contract law. For certain types of
transactions, the Common Law has been incorporated into state statutes. A
valid contract must represent a 'meeting of the minds', that is, an
understanding on the essential terms of the agreement.
Illegality
Contracts that require either party to perform an illegal act are
unenforceable.
--
David Wishengrad
President & CTO
MillLister, Inc.
Software for measuring and stretching multiple 3D solids.
Http://Construction3D.com