"To hold a licence" means to have official permission or authorization to do something, such as drive a car, operate a business, or practice a profession. Full definition
If they say they don't hold a licence then they could be operating illegally. (moneysmart.gov.au)
The board is also concerned about recent changes to the national code of ethics, and it is opposed to Realtor.ca showing for - sale - by - owner properties through brokers who do not hold a licence in Quebec. (remonline.com)
[as] whether, without permission from the Land Trust, a person holding a licence under the Fisheries Act can fish in the intertidal zone within the boundaries of either the Mainland Grant or the Islands Grant, or in the tidal waters within those boundaries. (humanrights.gov.au)