I contacted the Nova Scotia Tourism Department and received the following reply.
It looks as though logic has prevailed and overnight parking IS permitted.
The Tourist Accommodations Act remains the law of the land in Nova Scotia, however, officials of the Nova Scotia Department of Tourism, Culture and Heritage have stated that RV owners, as well as landowners are not committing an offence by simply parking or allowing parking overnight of an RV in a parking lot (i.e. shopping mall parking lots and other private property). According to the earlier interpretation of a provision in the Tourist Accommodations Act, a private landowner who did not have a campground license
was subject to prosecution if he/she allowed RVers who were members of the traveling public to park overnight on his/her property. Although the Tourist Accommodations Act is still in place, it has been determined that RV owners are not committing an offence by simply parking overnight in a parking lot. Therefore, we are please to advise you and other RV travelers that there is no ban or law restricting RV parking in Nova Scotia.
We continue, however, to promote and encourage the use of our private, provincial and federal campgrounds for the safety and comfort of our visitors.
Travel Counselors are available 7 days a week to assist you with reservations for accommodations, car rentals, and adventure tours.
Our brochures and services are always free!
Check In Nova Scotia
1-800-565-0000 or 902-425-5781