Before you start jumping through hoops for no reason, make sure you read a copy of the original project specifications and the purchase order issued by your customer. Even if there are requirements for various documented procedures for controlled processes such as welding, painting, etc., check to see if your employer took exception to the requirements in the bid package that was accepted by your customer.
Next, make sure you review the requirements of any military or commercial welding standard(s) that was referrenced by the original purchase order to determine how and what you have to do to qualify the WPS. Every welding standard has it's own means of tweeking the requirements of how the welding procedures have to be qualified, what tests have to be performed, etc. There's no sense in attempting to qualify the test coupons by destructive testing if the welding standard requires the weld sample to pass volumetric examination before performing mechanical tests.
As for the WPT; I believe they are refering to a welder performance test, its what we call a WPTR in ASME and a WQTR by AWS.
Good luck - Al