Salt Lake City, Utah.Scott T. Smith | Corbis Documentary | Getty ImagesUtah Gov. Spencer Cox on Wednesday signed a bill that requires Apple and Google's mobile app stores to verify user ages and require parental permission for those under 18 to use certain apps, the governor's spokesperson told CNBC.The law is the first of its kind in the nation and represents a significant shift in how user ages are verified online, and says it's the responsibility of mobile app stores to verify ages — putting ...