The length of the field is not 'regulation'. = The field is not 'regulation' size.
Each agency has its own set of 'rules and regulations'.
the 'regulation of' gun sales by the government
(..) I need to talk to my friend. Sorry, you're not allowed here without a pass. He's right there, in the blue jacket! Can I? I'm sorry. Federal regulations! Then could you please just give him a message for me? -This is very important. -All right. What's the message? I don't know. (..)1995 TvShow: Friends Title: The One Where Rachel Finds Out Season: 1 Episode 24