Employees are responsible for up to 15 percent of their health plan premium.  The employees are also responsible for up to 15 percent of their dependent's health plan premium if the dependent is included in the program.  The combined portion of the employee's cost sharing for health plan premiums cannot exceed three percent of his/her annual gross household income computed monthly.  Native American children providing documentation of ethnicity are exempt from cost-sharing requirements, including premium payments and out-of-pocket expenses.