A 2 year contract shall be signed, for the repairs of the Water and Sewage network, the Water and Sewage service pipes and some repairs thereof, including a stand-by arrangement for emergency assignments within and after normal working hours. The contractor must also undertake repairs of leakages on private water and sewage pipes or pipes incorrectly connected to the sewage network, in the event that house owners do not oblige with the municipality's orders for repairs of errors.