casual worker means a worker engaged by the hour and who may be dismissed or leave the employer's service at any moment without notice and except as hereinafter provided shall not be engaged for more than 30 hours per week in ordinary hours.
contract worker means a natural person who is —
Clinical social worker means a person who practices social work as defined in § 54.1-3700.
Seasonal worker means a worker who has been paid wages by a seasonal employer for work performed only during the normal seasonal work period.
Volunteer worker means a person who is not your "employee", and who donates his or her work and acts at the direction of and within the scope of duties determined by you, and is not paid a fee, salary or other compensation by you or anyone else for their work performed for you.