The owner of each applicable portion of a Subarea, or a ground tenant if the applicable portion is subject to a ground lease, shall be responsible for the maintenance and operation of the required public access area. Maintenance shall include, but not be limited to, necessary repairs, litter control and the care and replacement of vegetation. The owner or ground tenant of a public access area may temporarily close the smallest portion reasonably necessary for the shortest period of time reasonably necessary to make repairs or to mitigate hazardous or emergency conditions, or in connection with construction on adjacent areas.