Clarification on Domestic Helper Only Allowed to work at Employer's Registered Address

In view of the recent news of a Domestic Helper being forced to work in China by her employer, would it be possible to have some clarification on the matter that Domestic Helpers are only allowed to perform their duties at the address as stated on the Employment Agreement.

What about the following:

a) Sending kids to school
b) Going to the market
c) Taking the kids for outing such as Ocean Park or gatherings
d) Others

Much appreciated.