Specifications include, but are not limited to: provide the necessary maintenance and repair service to keep two Zamboni Ice Resurfacers (models listed below) in good working order at the labor rates agreed to in the contract for normal working hours, evening hours, and weekend/holiday hours. The successful bidder will be reimbursed for parts and labor by the City after each repair call. Each service call must be invoiced separately. Each invoice shall indicate the date of service, as well as an itemization of labor billed noting hours and hourly rate(s), transportation fees if any, and parts and materials. No work is to be performed without owner authorization and issue of a purchase order to cover the necessary service.