score:11
Airlines use the TIMATIC database. Regarding Switzerland, the information comes from the SEM, but ironically SEM letters are not listed as an exemption. All it says is Swiss Schengen visas issued after 16 March can be used.
If the visa is issued before 16 March, you need to e-mail [email protected] (CC: [email protected]), attach the flight reservation and SEM letter, explain that the airline will NOT accept the passenger as it is, and ask that they co-ordinate with SWISS for an OK TO BOARD to be put in the reservation.
And indeed, the person must fly directly to Switzerland.