It is important to note the law does allow for some caveats. First, mental health and addictions coverage is not mandated; a plan does not have to offer this type of coverage. Also, group health plans with less than 50 employees are exempt. Finally, there is a cost exemption. If, after six months of meeting the requirements of this law, a company can demonstrate and have certified by a licensed actuary that the costs of providing this coverage are excessive, their group health plan can be exempted. Excessive is defined as an increase of the actual total costs of coverage by two percent during the first year or one percent in subsequent years.