Unless otherwise instructed by the designated Authority contact person, the contractor shall begin snow removal: 2.1.2.1 after three inches or more of snow has accumulated; and/or 2.1.2.2 when snow/ice build-up has become hazardous by causing slick conditions; and/or 2.1.2.3 whenever, at the Authority's discretion, the Authority deems otherwise necessary (the Authority reserves the right to limit the frequency of snow removal at each site even if it contradicts other areas of this contract). 2.1.2.4 Further, the Authority reserves the right to limit the amount of plowing at each site for any reason, including as occupancy may dictate. 2.1.2.5 It is required that the contractor complete snow removal and salting/surface treatment of the locations specified within 3 hours of notification. 2.1.2.6 In the event of back-to-back runs, the contractor must obtain authorization before starting the second run. 2.1.2.7 Pre-treating is permitted without prior approval by Authority staff when a snow event of two inches or more is predicted, during threats of severe ice accumulation on roadways and sidewalks, and/or as requested by property management staff. 2.1.3 Remove snow/ice from drives, parking areas, and sidewalks to the entry door(s) in such a manner that they are made safe and operable to vehicles and pedestrians at all times. Entire sidewalk(s) must be free of snow and ice. Contractor must take special care so as not pile salted snow or spread salt/surface treatment on landscaping or on grassy areas...