I'm a PTer with 4+ years seniority on the skilled payscale. I hit 4 years last winter and thus contractually finished my wage progression (currently $13.50/hr) and according to National Master Article 33: Other than the linguistical wrench that "On a prospective basis" poses, I read this to mean the COLA adjustment that's applied to the base wage rate for PTers (I believe +15¢ an hour now?) Should have been added to my pay rate at the very least on the date of my 4 year wage progression completion/seniority date and possibly should have increased again on August 1st (I'm not getting my hopes up on the latter but by god I'm gonna try.) If I'm being sincere, I'm trying to do as much as I can now to ensure my current pay rate is grandfathered in before any new contract (and thus negotiated GWI, especially one in which I legitimately fear management may reason to strip my 'skilled' classification retroactively so to at best pay me a wage 20¢ higher than a new hire and 30¢ less than my current rate) is ratified and I lose any chance at grievance against being paid less than our current contract's wage minimums (I've got some time but either way the earlier the better.) Would I be in the right requesting back pay for underpayment and/or the COLA adjustment be added to my current rate or am I missing something? (PS I've been essentially blown off by my 2 stewards and my BA hasn't answered my email or voicemail which is why I'm asking here first. PPS we have retention bonuses for new hires here and they often make more than I do so my immediate supervisor knows and is fine with my making the skilled rate. I made damn sure to let him know of an 'ongoing overpayment' in writing the day after seeing the first check from when I transferred to my unskilled bidded position so my liability there is like $50 tops. If my liability is greater than the back pay that's fine. If I had to follow this up with a grievance I would probably bid out to somewhere skilled first and just grieve the current pay rate. This is only to say that if it means shooting myself in the foot I'm more concerned with protecting future wages when the GWI hits than back pay.) Sorry for any excessive details but it's admittedly a complicated situation. Thanks for any input, all advice is appreciated.