Sort of. You can have a current sanction card from one league and bowl in another, non-sanctioned league. Your scores in the non-sanctioned league will not be recognized by the USBC, and you will not be eligible for any awards. However, bowling in the non-sanctioned league will not invalidate your USBC sanction, and you will be eligible for any awards earned in a sanctioned league.
Is it poermissible to get professional instruction during a sancioned bowling league game
Non-sanctioned leagues generally do not have a higher authority that governs rukes.
There is a "yearbook" put out each year. This will contain the averages of all the sanctioned bowlers in your locale. If you do not have access to one, ask your league secretary or the front desk clerk for one. They should have one.
You can view the rules for sanctioned league play in the US at USBC's website at bowl.com.
It is suppose to be filled out and paid for prior to bowling. Technically, games bowled prior to payment and card completion could be forfeited in a sanctioned league.
That the league is recognized by the USBC (United States Bowling Congress), formerly ABC (American Bowling Congress) as a league. The USBC is the sanctioning body in the US. It means that they are the ones that set the rules and make sure they are followed.
A pacer is sometimes used in league bowling where a team does not have a complete roster and another person is allowed to bowl for purposes of helping keep the pace of the teams bowling.
League Bowling happened in 1991.
League Bowling was created on 1991-07-01.
Only games bowled under a sanctioned league may receive recognition by the sanctioning organization that the league sanctioned with. For example, if the league is based in the US and did not sanction in USBC then scores will not be recognized for any USBC awards, including the 300 ring. Even if bowlers who are members of a non-sanctioned league bowl a 300, they can not qualify for any USBC awards if the league did not sanction.
There are no rules pertaining to the number of games a league bowls each session / week. By default, three games are bowled. Some youth leagues will only offer two or one games for very young bowlers.