Section 36(1)(a) in Assam Public Procurement Act, 2017
(a)A procuring entity may choose to engage in a rate contract procedure in accordance with the rules as may be made in this behalf, under this Act where it determines that, -(i)the need for the subject-matter of procurement is expected to arise on an indefinite or repeated basis during a given period of time;(ii)by virtue of the nature of the subject-matter of procurement, the need for it may arise during a given period of time.