There is no precedent for a federal policing contract in Ontario so we a split-balling, but if it followed the current OPP contract model, a place like Pet or Borden would simply be rolled into the local detachment. Even when absorbing a municipal service, they will no longer establish a dedicate detachment. Very briefly state, a contract involves a combination of a per-capita amount plus a calls-for-service amount (for initial contracts, that number is drawn from existing records for, I believe, three years). For that you get a police service; no site security, property checks, key control, etc. The ability/authority to control or limit people on the property would be questionable. Anything that is specific under the NDA, federal traffic regs, etc. would be difficult, both because of the movement of personnel but their concept of 'closest car'. It may be that a neighbouring detachment unit is closer. I could really see this happening at Borden.
It would largely be new ground since a CF facility is both a work space and a residential space. They would have to sort out some kind of equivalent to a Police Services Board which is a requirement under the Community Safety and Policing Services Act. There would also be no communications linkage between the police service and local CoC on individual incidents, even if they impacted operational matters, as I assume there is with MPs. As well, the CoC would have no input into how, why or when the policing service is delivered, which could be a good thing or bad thing.
If it involved a municipal PS like Ottawa or North Bay, there is no model for contract policing. Municipal PSs do contract policing of other municipalities but they are free to do it in any way that makes both parties happy and so long it satisfies the Ministry that it is 'adequate and effective'.