Which number format is used for called$-$ and calling$-$party numbers during the actual call$-$routing process of an outbound PSTN call?

Calling party: directory number; called party: PSTN number according to local dial rules

Calling party: E$\mathrm{.}164$; called party: $+$E$\mathrm{.}164$

Calling party: directory number; called party: E$\mathrm{.}164$

Calling party: $+$E$\mathrm{.}164$; called party: $+$E$\mathrm{.}164$