* The country: Labor laws regarding minors vary significantly by country. Some countries have much stricter limits than others.
* The state/province (if applicable): Even within a country, individual states or provinces might have their own regulations.
* The type of work: Some jobs might have restrictions regardless of overall weekly hour limits.
* School schedule: A student with a lighter college course load might be allowed more hours than one with a heavy one. Some colleges may have rules about working hours for their students.
To find the correct answer, you need to research the specific labor laws in the 17-year-old's location (country and state/province). You can usually find this information on the government's website related to labor or employment.