The correct answer is: A. T-369(3b)
T-369(3b) states that “The advance starter may be passed during shunting operation in its
on position, provided that the shunting locomotive is in sight of the person giving the signal.”Option B, a written memo, is not a valid authority for passing an advance starter during shunting operation.
Option C, an on hand signal, is not a valid authority for passing an advance starter during shunting operation.
Option D, T-806, is the rule that governs the use of advance starters. However, it does not specifically address the issue of passing an advance starter during shunting operation. Therefore, T-369(3b) is the more specific rule that applies in this situation.