The TSI Act imposes direct reporting obligations on pilots, among other persons. Those statutory obligations cannot be negated by contract.
A pilot’s statutory reporting obligations may be discharged if there is a reasonable belief that someone, like his or her employer, will make a report.
I don’t see how it’s reasonable for a pilot to believe that his or her employer will report something, if the report is against the employer’s interests.
The fact that a purported constraint on reporting could openly be contained in a contract of employment shows the extent to which the system has deteriorated.