The share of expenditure borne by the local authorities for the construction and operation of secondary and special education establishments that were municipal on 1st January 1986, the date of transfer of responsibility, as well as their sports teaching annexes is, in the absence of an urban community and in the absence of assumption of responsibility by a district or a syndicate of municipalities, or in the absence of an amicable agreement, shared between the local authorities and groupings of municipalities concerned under the conditions set out below.