How Will M15 +SBS+ Collects Fare on 3rd Av Detour

[FamousNYLover]

I saw sign at 1st Av/57th, 68th, 79th, etc that M15 +Select Bus Service+ will make detour with local bus on 3rd Av from 57th to 126-128th Sts area?

 

My question is how bus riders will paid on SBS?

1. Paid on bus like old M15 LTD and give us bus transfer as recepit?

2. Offering free ride and give bus transfer as receipt? (I remember when Inwood Station Machine on Bx12SBS was closed, driver made us paid on bus or just step in?

[EE Broadway Local]

Yuki, if local buses are being used for the detour via Third Avenue, likely riders will pay their fare on board.

[IRT Bronx Express]

Then the back doors can't be used if that's the case.