A chemical toilet may only be used as a method of sewage disposal under the following conditions: As a temporary alternative for an existing building where water under pressure is not available until such time that a permanent means of sewage disposal is provided for that building; For a temporary event not to exceed fourteen (14) days; Building construction sites during construction; At the discretion of the Health Officer, in parks owned or operated by a governmental agency. Chemical toilets must be maintained and emptied as necessary by a licensed scavenger to prevent a sewage disposal nuisance.