特准限期是完成參加強積金計劃的指定期限，一般為非臨時有關僱員受僱首60日、臨時僱員受僱首10日，或自僱人士開始自僱起計60日。
The permitted period is the enrolment deadline, normally the first 60 days of employment for non-casual relevant employees, the first 10 days for casual employees, or 60 days from becoming self-employed.