ECOLOGIC PROGRAM. The CONCESSIONAIRE shall be obliged to elaborate ecologic program in conformity to the Business proposal for operation of Sofia Airport, to present it in term of one month as from the entering into force of Concession Agreement and to fulfill it on his own account. The ecological program (Annex No 18) shall include: а) plan and fulfillment of measures on limitation of negative impact on the components of environment of activities on the territory of the Airport;