Not sure if this ^^ is in reference to SS"A", but if so, the following bold underlined revision has been in the 2014 rule book since it was published in January (printed RB page 21):
j) DOT-approved tires with an S or higher speed rating must be used and the original tread pattern cannot be grooved or modified. Slicks may not be used with the exception that slicks may be used in the “A” Superstock class. Rain tires can only be used if the event is declared wet by the Director of Competition. Non-DOT-approved rain tires may be used with no modification of their original molded tread pattern.
If you are 'offended' by another competitor running slicks in a Superstock class other than "A", simply file a "Class Suitability" Protest ($25 fee) within 30-minutes of the results posting. The fee will be returned to you and the results revised when the race Director confirms (usually by conversation with the 'alleged offender' who acknowledges the 'error' or by check with Grid Marshalls) that indeed slicks were used.