Because of the shear nature of the game its has been brought in under IRB regulations that age groups should be used to maintain a fair and reasonable equality. This is because someone who is 17 playing against a 13 year old for example will encounter a massive difference is build and capability and lead to injury.
You can play as long as you are able to safely.
There are no age restrictions.
Depends on country,club,grade and age
There are no age restrictions on Minecraft so technically yes you can play Minecraft age 9.
Schools normally start contact sports like rugby at the age of 11
Normally if the season starts and you are at or under the age then yes
There aren't any age restrictions unless your team or league has them!
No, you cannot get a Gmail with no age restrictions. Age restrictions have been there since it's begining. The restriction of age is not above 13 years.
Professional table tennis does not have a required retirement age.
There are no age restrictions on ownership. However you do need to be of a certain age to have a contracted service. The age will vary depending on the local legislation.
Because some movies are not appropriate for people of a certain age.
The junior game is doing well. Its now starting from 7 to 10 years of age