couple of things you need to take note when renting out.

1) Must inform management.
2) Must hand over the tenancy agreements to the management in order to apply for resident card / badge.
3) Usually, in order to use the facilities, the user must possess the resident card.
4) The amount of ppl in a unit must not exceed the limit set by the government body.. ie not more that 8ppl in a 1000sqft area.

The issue is that usually 2,3 & 4 are not done by the owner, thus the students are having issues with management.

There are cases where the tenancy agreement are not valid, example nigerians are renting,but they use other ppl's name to register in the tenancy agreement, which is wrong.

My mistake.. i assume that there is an existing law/rule for renting units out as hostels for TS's condo.