Bowling Federation Technical Committee has recommended the IBF not make any changes to its urethane rules, according to a picture of an email posted on Facebook by the Thai Tenpin Bowling Association. I no longer can find the post and picture on Facebook, so it may have been taken down. But a picture of the email converted to a PDF is attached to this story. The recommendation is that only balls... subscribe to read more. In the wake of USBC’s new restrictions on urethane balls announced Sept. 4, the International Bowling Federation Technical Committee has recommended the IBF not make any changes to its urethane rules, according to a picture of an email posted on Facebook by the Thai Tenpin Bowling Association. I no longer can find the post and picture on Facebook, so it may have been taken down. But a picture of the email converted to a PDF is attached to this story. The recommendation is that only balls... Social Media: