"Base of operations" means the place of more or less permanent nature from which the employee starts work and to which the employee customarily returns in order to receive instructions from the taxpayer or communications from customers or other persons or to replenish stock or other materials, repair equipment, or perform any other functions necessary to the exercise of the employee's trade or profession at some other point or points.
"Place from which the service is directed or controlled" means the place from which the power to direct or control is exercised by the taxpayer.
Haw. Code R. § 18-235-34-01