Mandatory full testing of imported limestone at designated laboratory; importers must provide samples and bear testing costs. Import consignments of limestone must undergo full testing to verify parameters in IS:10345 of 2004 because the prior laboratory could not perform certain determinations; samples shall be forwarded to the designated external testing facility in Kolkata capable of conducting the complete test matrix (items (i)-(vi) of table 1, clauses 5, 6.1.1 and 7). Importers shall bear testing costs, submit the prescribed sample quantity for a full test, and pay fees by Demand Draft at submission.