Yes... but very hard to find!
yes
There are few options when it comes to becoming a certified senior adviser. There are many educational institutions that offer certification for a senior adviser.
yes as long as they are both the same size eg. junior, senior ect.
BFA Senior League was created in 1990.
Leicestershire Senior League was created in 1896.
I just picked up a sweet Easton Stealth from this site. It's definitely worth checking out. This site has a ton of different bats. I use it to buy bats for my son's league.
South Wales Senior League was created in 1991.
National Senior Classical League was created in 1960.
Staffordshire County Senior League was created in 2005.
Essex Senior Football League was created in 1971.
Gloucestershire Northern Senior League was created in 1922.
Carillon Senior Hockey League was created in 2003.