Under Section 4 of the Travel Agents Act (Cap. 334), a person carries on the business of a travel agent if the person carries on, or advertises or holds himself out as carrying on, a business of any of the following:

1. supplying any person a right to travel on any conveyance;
2. supplying any person - 
   • a right to travel on any conveyance to; and
   • a right of accommodation at a hotel or similar boarding premises at, one or more places, whether in Singapore or elsewhere;
3. purchasing, or reserving, for resale to a person a right to travel on any conveyance;
4. supplying any tour (whether or not organised by the person) to any other person; or
5. such other similar activity as may be prescribed.

The term "supply", in relation to a travel product, includes the sale, or arranging for the provision, of the travel product.