What benefits must we provide a temporary employee?

Q: “We are creating a category for temporary employment; this employment would be no longer than 12 months with a specific end date of employment. What benefits are we required by law to provide a temporary employee? We do not provide health, dental, disability and life insurance to part-time employees; are we required by law to provide these benefits to a temp employee who may work 40 hours a week? And what about retirement, specifically our 403(b) program? We do provide a 403(b) match for full time employees after they work 1,000 hours. Can we stipulate that the match is a benefit only to full-time employees and not temporary employees?” - Laura, Indiana