What are the most important changes we do when turn direct speech into reported speech? And how do we report questions and commands?

To convert direct speech to reported speech, we must change all the present tenses in the direct speech to the corresponding past tenses in the reported speech and to report questions and commands use a reporting verb like request, order, tell, advise, beseech, threaten, beg, implore, ask, propose and forbid. Note that all of these verbs except propose must be followed by an object. Commands and requests are usually reported using a to-infinitive. That-clauses can also be used.

the legal limit for the drivers who can drive after consuming any amount of alcohol is 21 years.

explanation:

on november 1, 1996, a "zero tolerance law" was put into effect in the new york state.

according to this zero tolerance law, for people under the age of 21 years, it was illegal to purchase and possess alcohol or to drive after consuming any amount of it.

also, the alcohol involvement rate for the drivers under the age of 21 was roughly twice that of elderly drivers.