Colorado this week became the first state to regulate smartphone rides-on-demand businesses such as Uber.
Hickenlooper spokesman Eric Brown had no comment on the new measures.
Companies that enable the public to hail rides from drivers via smartphone apps have become a popular choice, competing with taxis and limousines.
The business as a whole, however, has come under scrutiny. Traditional transportation companies, which are heavily regulated, have criticized the rides-on-demand model, complaining that the services have an unfair advantage because they are not required to follow the same rules.
Safety has become an issue too.
A driver with Uber was arrested this week on suspicion of kidnapping a drunk woman and taking her to a hotel for the purpose of sexual assault, Los Angeles police said.
In a blog post Thursday, Uber hailed Colorado for the laws.
"Make no mistake, Colorado has sent a clear message that it embraces innovation, supports consumer choice and empowers small-business owners," the company post said. "This new law ensures that other rideshare providers meet these same stringent requirements so that all options in Colorado are safe for everyone."