IBR Regulation 608 onwards specifies about Welder Qualification certificate.
There is chapter related to :
QUALIFICATION TESTS FOR WELDERS ENGAGED IN WELDING OF BOILERS AND STEAM-PIPES UNDER CONSTRUCTION, ERECTION AND FABRICATION AT SITE IN INDIA AND IN REPAIRING BOILERS AND STEAM-PIPES BY WELDING
WPS PQR are not required.
Thanks and regards
Vishwas
IWE