(19) Where a licence of occupation of public lands without improvements, other than a licence of occupation of public lands in the Town of Banff, granted for the purposes of trade, tourism, service stations or places for the accommodation, recreation or entertainment of visitors to the parks does not include a term providing that the licensee shall undertake and complete prescribed construction within a prescribed period, the Minister shall not consent to the assignment of the licence unless, prior to that assignment of the licence, the licensee agrees to include that term in the licence.