overtime pay reductions

[challenger19]

how much time does the law allow between notification of intent to reduce rate of overtime pay and implimentation of reduction?

[factor-fiction]

I can't see there being a law on this. There is no right to work overtime. Provided the employer tells you of the change before you have worked it then I guess you have the right to either accept the lower rate or not work overtime. If you have a union with a collective agreement that may include a procedure about notice

[buildersmate]

This isn't what is being asked, Factor. The questioner is asking about the RATE at which overtime if worked is payable (i.e. time and a half or time and a quarter).
The answer to that is that the employer is changing the terms and conditions of employment and must therefore give at least the notice period, which may be different for different employees. A pragmatic employer would start a period of consultation, with a proposal to change it in say 6 months time.

[factor-fiction]

Sorry buildersmate but my reply was about the rate. I used the words 'lower rate'. As you are the lawyer I accept what you say about the notice period. I also agree a good employer would give notice- although 6 months seems a long time to me. But in my experience if the company wants to push it through quickly it will do- if people make an issue it can simply stop offering overtime.