extension rule

noun

1. a folding rule having a sliding part equal in length to one section so as to permit exact measurement of internal dimensions.

Example Sentences

Notably, Indiana’s Paul George and Utah’s Gordon Hayward were absent from Thursday’s selections, which means their teams will not be able to offer them potential five-year, estimated $207m ‘supermax’ contract extensions under the league’s new designated player extension rule, which comes into effect under the new collective bargaining agreement taking effect on 1 July.

From The Guardian