Deduction of employee health insurance premiums

[Guest caro]

I am working for an employer who wants to deduct insurance premiums from employee's salary before the premium is due. In other words, the employer wants the employee to pay 13 months premiums during 12 months...so that the employee will always be one month ahead in premium deductions. I think he should pay the monthly premium and then deduct the amount from the pay checks during that specific month. Are there any rules or regs. regarding how the premiums are deducted from employee salary in this case?