Conn. Agencies Regs. § 9-242-12
The manufacturer shall supply, at the manufacturer's expense, any special tools required to repair or maintain the equipment. The manufacturer shall ensure that trained personnel are available to assist the purchasing town in the event election officials and/or the local technicians/mechanics are unable to resolve a problem with a punchcard or marksense voting system. Factory engineers shall be reachable by telephone during normal business hours in non-election periods and be on 24 hour call during election periods. Election periods are defined as the eight calendar days prior to the conduct of a general election, special election, primary or referendum as well as election day. In the first primary and first election in which the punchcard or marksense voting system is used in each municipality, a qualified manufacturer's representative shall be present, in person, in the municipality to respond to requests for assistance.
Conn. Agencies Regs. § 9-242-12