Firstly, do note that you will have to be covered under Part IV of the Employment Act in order to be eligible for Rest Day Pay and Overtime.
Now, if you work less than or equal to your normal daily working hours on a Rest Day, you will only be entitled to Rest Day Pay. Overtime starts when you clock more than your usual normal working hours.
The computation for Rest Day Pay is as follow:
|Request||<= 1/2 normal daily working hours||> 1/2 normal daily working hours|
|Employer’s request||1 day basic salary||2 days basic salary|
|Employee’s request||1/2 day basic salary||1 day basic salary|
Reference can be found under my Page “Sources”:
Rest Day Pay