503.9.a. When a player channels runes or draws a card at the start of their turn, it is assumed that they have passed through the Beginning Phase.
503.9.b. When a player places a spell or ability on the chain, they are assumed to be passing priority unless they explicitly announce they intend to retain it.
503.9.c. When a player puts a spell or ability on the chain and announces choices for it that are normally made upon resolution, they must adhere to those choices unless their opponents react.
503.9.d. When a player asks about choices normally made upon resolution, they are assumed to be passing priority and allowing the spell or ability to resolve.