But you answered the OP’s question with a definite nope and used that link to support your position.

Your link and OP’s situation are different. The company in the article was intentionally fluctuating wages based on employee hours to avoid paying OT. The base wage of the employees was entirely contingent on hours worked. More hour equaled lower hourly rate.

OP’s employer is permanently reducing wages. OP’s hourly rate will be the same regardless of hours work. An employer can legally reduce your wages; no law against that. The adding of mandatory OT puts it in a legal grey area. However, the employer is still calculating OT off of a static hourly wage so may be in compliance with the law.