For the use of the SchnellBus or the 1st class of RB/RE, surcharges apply, except for single tickets for inner-city transport and short-distance SchnellBus. Surcharges for the SchnellBus or the 1st class of RB/RE entitle the holder to use the SchnellBus and the 1st class RB/RE on the specified day of validity until the end of operation. The surcharge to a single ticket is valid for one trip on the specified day of validity. Surcharges are only valid in conjunction with the ticket for which they were purchased.