Ottawa By-law 2017-301, s. 16(17) — Traffic and Parking By-law

A residential parking permit holder may park the vehicle in respect of which the permit was issued on a highway designated for permit parking in the designated permit parking area up to 48 hours without moving the vehicle as long as the signs bearing the words "Permit Holders Exempted" are posted. (17A) No person shall park or permit a vehicle to remain parked on a highway, in respect of which a residential parking permit has been issued, exceeding the 48 hours permitted under subsection (17).