Power play (hockey) face-off question

[OldGuy]

Suppose a period ends with a delayed penalty call one one team. Is the opening face-off of the next period at central ice or in the offensive zone of the team on the power play?

[Rysto]

Centre Ice.

[Number]

The NHL helpfully publishes their full rulebook online. Here is the relevant entry.

When players are penalized at a stoppage of play so as to result in penalties being placed on the penalty time clock to one team, the ensuing face-off shall be conducted at one of the two face-off spots in the offending team’s end zone. There are only four exceptions to this application:

[…]

(ii) when a penalty is assessed at the end (or start) of a period - face-off at center ice;