There is a risk a volunteer may expect employee entitlement from TSA.
To minimise the risk, volunteer status must be crystal clear. Read the Volunteer Engagement Management Handbook and all volunteer resources to minimise the risk and any possible confusion. Pages 14, 20, 26 and 31 deal with elements of risk.
Contact the Volunteer Resources Team if an employee's part-time position is the same as the proposed volunteer role.
Volunteer engagement management handbook V2