Licensing law is the set of legal rules governing the sale of alcohol in a given jurisdiction. It usually defines who can sell alcohol, when, where and to whom. Generally the underlying purpose of licensing law is to act as a protection against any potential harm to public order or to public health. This is sometimes stated in the law.
Where a license is needed, there are often restrictions on the times you can sell alcohol. It is illegal to sell alcohol outside the hours specified by laws.
The hours may differ depending on the type of license you have, e.g., whether you are selling alcohol to drink on or off the premises or whether you are serving food to go with the alcohol. You can find out what the laws are regarding the hours you can sell alcohol from your manager or from a relevant government office, sometimes called a Liquor Licensing Department

The various issues bordering license laws are: -

commercial/non-commercial alcohol

Licensing laws generally apply in all situations where alcohol is sold or distributed. Alcohol can be produced commercially or noncommercially. Commercially-produced alcohol includes all the well known drinks and brands, many of which are available worldwide, as well as nationally or locally produced drinks. Whilst many of these drinks are produced to high quality, serious health problems have also been associated with noncommercial beverages, as controlling the alcohol content and ensuring the purity of the product can be difficult.

license to sell

Most countries that have restrictions on who can buy alcohol will also have restrictions on who can do the selling. In order to sell alcohol, you may have to obtain a permit or license.

permitted hours

Where a license is needed, there are often restrictions on the times you can sell alcohol. It is illegal to sell alcohol outside the hours specified by laws. The hours may differ depending on the type of license you have, e.g., whether you are selling alcohol to drink on or off the premises or whether you are serving food to go with the alcohol.

age and alcohol

In most countries, it is forbidden to sell beverage alcohol to a person under a certain age. The legal age is set because alcohol can be very dangerous to the young. This is because they generally lack the experience of dealing with alcohol and their internal organs haven’t finished developing, so a small amount may have a much larger effect than it does on adults.

other duties/ offences

As someone who sells alcohol, you may have many responsibilities apart from checking the age of the person you are serving. Serving alcohol to a person who is already intoxicated is an offence in most countries. Once drinkers have consumed alcohol to a level that they are showing signs of intoxication, their normal judgement is impaired. Therefore, it is up to the server, not the customers, to decide whether or not they should be served.

drugs

It is not only alcohol that is regulated by laws regarding its sale and consumption; drugs may also have legal obligations. In many countries, these are sometimes found legally or illegally in places that sell alcohol. For e.g. cannabis, heroine, ecstasy, cocaine etc