OAR 738-050-0010. Taxiing

(1) Aircraft shall be taxied at a safe and reasonable speed. (2) Before entering onto any runway or turning for take-off, operators shall ascertain that their right-of-way is unimpaired and there is no conflicting traffic. (3) For the purpose of engine runup, taxiing aircraft shall be stopped at the standard hold line marked by solid/broken yellow hold lines. No aircraft shall be moved onto the runway until clear and ready for take-off. (See Figure 1) [ED. NOTE: Figures referenced are available from the agency.]