Yes it's true. But only applicable for ladies who's visas transfered from Husband/father sponsorship to a company sponsored visa. the fine is exagerated. labour dept can only assist them on this.

And for all other NOCs, it can only be granted by immigration if you've worked by the company or from an individual for at least 1 year from date of transfer or visa issuance. and this rule is applicable to all visa transfer. but you still require approval from the sponsor of course.