Government Regulations of HSAs
Health Savings Accounts (HSAs) and their cousin High Deductible Health Plans (HDHPs) are closely regulated by the IRS. Participating in an HSA means that you fill out certain paperwork, meet certain requires, and understand certain limitations on contributions and usage.
Since we at Brainy Patient are not lawyers, nor are we your company's HR professional, we feel the best technical advice we can give you is to point you to the source, the United States Treasury's code on HSAs. Here, you can understand exactly how an HSA works, and what rules govern all HDHPs and HSAs.
We also recommend you read your plan handbook as well as cover any questions with your HR professional or plan administration.
US Treasury Code on Health Savings Accounts:
http://www.ustreas.gov/offices/public-affairs/hsa/