651.The powers in this section enable enforcement officers to enter and inspect any premises (subject to the need for a warrant pursuant to section 249 if the premises are a dwelling) to carry out any relevant functions. “Premises” includes land but does not include a vehicle, vessel or marine installation. Entry must be at a reasonable time unless the officer believes that, by waiting for that reasonable time, the purpose for requiring entry and inspection may be thwarted. The officer also has the power to request assistance from people who have some control in the situation. This may be needed for instance in unlocking a door or opening a container. Where the premises are a dwelling, a warrant is needed before the power of entry may be exercised. Provisions regarding warrants are set out in section 249.