Section 110(1) in The U.P. Municipalities Act, 1916
(1)A [Municipality] [Substituted by U.P. Act No. 12 of 1994.] may, and if so required by the [State Government] [Substituted by ALO 1950.] shall, combine with one, or more than one, other assenting local authority to appoint by means of a written instrument subscribed by the local authorities concerned, a joint committee for the purpose of transacting any business in which they are jointly interested.