Bullet, blitz, standard - time control rules

I have been trying to figure out what time control rules are applied in Live chess to distinguish between Bullet, Blitz, and Standard. When it comes to the default ones I think 1/0 and 2/1 are Bullet; 3, 3/2, 5, 5/2, and 10/0 are Blitz; and 15/10, 30/0, and 45/45 are Standard. Nevertheless, I would like to know general rules that are applied to custom time controls. It seems that both the manin time and increment matter for 10/0 is a Blitz game and 10/10 is Standard. Players sometimes choose strange time controls (I have seen stuff like 1/50 and 9/20). I am sure Chess.com has got some general rules for they have to decide what rating will be changed after a game but I have not found them yet.

Here you go.  Help & Support is your friend.  Older article that doesn't include the latest time changes but same general rules...

https://support.chess.com/customer/portal/articles/1444851

Thank you, baddogno. I knew it would be explained somewhere but did not find it.

FYI

I googled the following and the first hit directed me here:

blitz bullet and standard time controls site:chess.com

Here's a little chart I brewed up for my own curiosities:

The times shown are your total clock time assuming 40 moves will take place. Base time (b) is in minutes, increment (i) is in seconds.

Interesting things to note:

     - 2|1 is the longest bullet game unless the game reaches 60 moves.

     - Assuming 40 moves, 14:40 is the longest blitz game (14|1, 12|4, 10|7, 8|10, 6|13,      4|16, 2|19).

     - A 1|20 game is blitz and grants a total of 21 minutes per side if it reaches 60 moves.

Thank you for your comments C. J.

I always suspected Google of giving weird links (rubbish) first and since something I wrote was the first hit I rest my case. 

You made a very interesting chart! I reckon you should send it to the Chess.com staff for they would likely add it to their page mentioned above.