To remain certified, RMAs who were certified after 2006 must accumulate ________ contact hours for continuing education units (CEUs) every three years.

Continuing Education Units (CEUs)

A measure used in continuing education programs, particularly for professionals, to maintain licensure or certification through courses and training.

Certified

Officially recognized or having received a certification that verifies an individual's qualification or a product's standards.

RMAs

Refers to Return Merchandise Authorization, a process used by companies to authorize the return of defective products for repair, replacement, or refund. If referring to a different context, clarification is needed.