Hello,
Please look at it this way!
Employment is a contract between the employer and the employee that defines the relations between them in terms of mutual rights and responsibilities and binds them to stipulated mutual covenants. This contract underscores mutuality.
It also means, therefore, that each party is bound to do only that which it is empowered to and is prohibited from doing anything that is not empowered by the provisions of the said contract.
This situation can be superseded by any applicable law on any given subject. If conflicting positions occur between the applicable law and the provisions of the contract, the law will prevail since we cannot contract out of the law! Just remember that the law always provides the minimum on any subject.
Given this analysis, it is clear that the employer cannot change the notice period unilaterally (unless he has reserved a right to do so on any issue and the employee has accepted such condition). Normally, the appointment letters do say that, "rules applicable at any stage will bind the employee," and employers may take advantage of such a provision. I am of the opinion that such a provision, even if it exists, will render itself void in a court of law!
But the most unfortunate part of this reality is that the remedy does not lie in labor law because in most cases, the aggrieved employee may not be a "workman" under the Industrial Disputes Act 1947. The remedy will, however, be in civil law, being an issue of breach of contract or of non-equitable contract and having "accepted" the term, it will be difficult to convince the court about one's grievance on the matter!
The above logic applies to the matter of "probation period" as well.
Trust all are clear on the subject!
Regards,
Samvedan
July 11, 2010