Original: Under the Radcliffe Award, Shakargarh tehsil was transferred to Pakistan and attached with Sialkot District. However with the creation of Narowal District on 1 July 1991, Shakargarh became tehsil headquarters was included as one of its tehsils.
Simplified: Shakargarh then became part of Sialkot District, however when Narowal District was created in 1991, Shakargarh became part of that district.