Can I be forced to part-time status?

[dfreebo]

Hello from Alabama. I began working a part-time (second) nonexempt job in 1998 with the world's largest retailer. At the time, the company's policy was that 28 hours a week or more constituted full-time employment. For three years I worked with part-time status, no benefits, while consistently clocking 30-36 hour work weeks. I did not complain, and have no grievance. Eventually, however, the company changed my status to full-time, and my work week leveled off to approx. 32 hours. Soon thereafter, company policy changed to required 34 hours for full time status. I was told, however, that I would be grandfathered in because I had been hired under the old policy.

All was OK until now. The company has now removed all authority for making schedules from its managers and computerized the system, eliminating unique shifts such as mine (6 p.m. - 10 p.m. M-Th/2 p.m. - 8 p.m. Fri./7 a.m. - 3 p.m. Sat.-Sun.) and creating a set, three-shift system. Under this new system which goes into effect Sept. 1, my hours have been cut to 21 hours a week, and I stand to lose (in addition to considerable money) all benefits. Besides quitting, do I have any recourse?

[cbg]

Duplicate post. Answered elsewhere.