29 CFR § 825.217 - Key employee, general rule.
(b) The term salaried means paid on a salary basis, as defined in 29 CFR 541.602. This is the Department of Labor regulation defining employees who may qualify as exempt from the minimum wage and overtime requirements of the FLSA as executive, administrative, professional, and computer employees.
(c) A key employee must be among the highest paid 10 percent of all the employees - both salaried and non-salaried, eligible and ineligible - who are employed by the employer within 75 miles of the worksite.
(1) In determining which employees are among the highest paid 10 percent, year-to-date earnings are divided by weeks worked by the employee (including weeks in which paid leave was taken). Earnings include wages, premium pay, incentive pay, and non-discretionary and discretionary bonuses. Earnings do not include incentives whose value is determined at some future date, e.g., stock options, or benefits or perquisites.
(2) The determination of whether a salaried employee is among the highest paid 10 percent shall be made at the time the employee gives notice of the need for leave. No more than 10 percent of the employer's employees within 75 miles of the worksite may be key employees.