Hello! I'm writing a restaurant scenario for class and was wondering if this would be the proper way to phrase what I'm trying to explain. Any help would be appreciated!

This is the translation (it would be posted on a sign in the scenario):

According to California law, customers must ask for straws. 

Sorry for the inconvenience!

カリフォルニアの法律ではお客さまがストローを求めなければなりません。

ご迷惑をおかけしております！