Good rules writing focuses on what you CAN do not on what you CANNOT do. You won't find a rule stating you cannot do this or that
I beg to differ, what you cannot do, is often referred to as 'exceptions'. For example you cannot Intercept during SR due to a specific exception.
Redeployment is referred to as movement, and makes special mention that attrition is checked when exceeding the 'printed' movement, not only when doubling the movement due to leader.
Forced march adds 1-3 MPs to movement.
A possible interpretation is that units can force march during SR, but must check attrition. A leader-led stack 'double-timing', may or may not force march, but will need to check attrition even if it does not.
I think this above interpretation is wrong however. Because forced march states that it applies to 'activated' units. And SR units are not 'activated'.