Labour Act, Section 4(8) (Probationary Period)
According to section 4(8) of the Labour Act, the period of probation for a worker whose function is of a clerical nature shall be six months, and for other workers such period shall be three months.
In the case of a skilled worker, the probation period may be extended for a further period of three months if it is not possible to ascertain the quality of work within the first three months of probation. Further, a worker shall be deemed to be a permanent worker after completion of his or her probationary period or extended period of three months even if a confirmation letter has not been issued.
Therefore, apart from extending the probation period of a skilled worker for a period of three months if it has not been possible to ascertain the quality of his or her work during the intial three months, the employer may not extend the probationary period at his or her discretion.