My employer currently offers health insurance coverage for all full time employees at no expense to them. We have a part time employee that has been employed with our company for a long period of time, and wishes to be placed on the company insurance. The part time employee is willing to pay for her insurance premium in full. We are located in Florida and desperatley searching for infomation on this situation. Are there any articles that would clarify this issue? I have previously been told that as long as we make it standard practice to provide part timers benefits if they wish to pay for them then we are not in violation of any laws or regulations. However we have not found this in writing. Any advise will be appreciated

There are generally no nondiscrimination issues for health insurance (outside of a cafeteria plan). That may be why you can't find the law.
My advise would be to check with your carrier and see if they permit it. Since there is no employer contribution contemplated for part time employees, it seems that only those who would expect to have claims might sign up.