conversion of existing street lights into energy efficient led lights and operation & maintenance of the street lighting system for a period of ten years in 18 nos. town panchayats namely paravai , alanganallur, vadipatti, sholavandan, a.vallalapatti, palamedu, t.kallupatti, peraiyur, elumalai madurai district and seithur, watrap, chettiyarpatti, kariyapaitti, mamsapuram, sundarapandiam, mallanginar, wpudupatti, s.kodikulam virudhunagar district, madurai zone ( package-1 ) a ) the quantities here given are those upon which the estimate cost of the work is based but they are subject to alterations, commissions, deduction or additional as provided for in the conditions of this contract and do not necessarily show the actual quantities of work to be done. the unit rates notes below are those government payment for extra or deductions of commission according to the condition of the contract set forth in the payment preliminary specification of the madras standard specification read with the town panchayat councils adaptation from and other conditions or specification of this contract and subject to the accepted tender percentage either below, above or at estimate rates a defined in the tender and as shown at the end of schedule a.b ) it is expressly understood that measured work is to be taken net-not withstanding any custom to practice to the contrary according to actual quantities when in the place and finished according to the drawings or as may be ordered from time by the assistant executive engineer at the cost calculated by measurement or weight at the respective prices with out any additional charge for any necessary or contingent works connected herewith. the rates quoted are for works in-site and completed in every respect.c ) the material required for the works must be supplied by the contractor and of the approved quality.