Constant PENDING_PINS 

const PENDING_PINS: &[(u16, &str)];

Every code whose convention is partly pending a vendor screen pin, and what is outstanding — in ascending code order, transcribed from the row comments in VendorCalcMethod::from_code. A test re-derives the set from those comments, so a new PENDING note without a row here, or a row whose note has gone, fails by code.