Followers of the San Francisco 49ers who dwell on the Peninsula have long relied on special SamTrans bus service to Monster Park, or Candlestick Park if you prefer, on game day. It’s been a convenient, inexpensive and practical transit option which has allowed customers to avoid traffic and parking fees. It also has been a solution for those football fans who like to imbibe before, during and, yes, after contests. But it may be about to end. That’s because of new federal regulations that bear directly on the charter bus industry and how publicly-funded competition, like SamTrans, may affect the private side. Local SamTrans officials are trying to figure out if they can continue to provide express buses to Niner ballgames in light of the federal rules. According to Christine Dunn in SamTrans’ San Carlos headquarters, a final decision has not been reached. The first 2008 San Francisco home exhibition game is scheduled in mid-August.