I understand lockout periods when you're in a company but what about after you quit?

If I were to no longer work for a company can I buy it's stock without any insider trading issues (assuming I had no insider info)? Is there a given period of time that I need to wait?

Ex what if I work for CocaCola and then quit. Can I buy coke shares the next day?

Please give a reference to the rules you find. I couldn't find any specific to once you leave a company only to things like stock options etc.

US law dictates that you cannot buy / sell shares in a company you work for except during open trading windows. I understand lockout periods when you're in a company but what about after you quit?

If I were to no longer work for a company can I buy it's stock without any insider trading issues (assuming I had no insider info)? Is there a given period of time that I need to wait? I'm asking for a general US based insider trading law.

Here is an example: what if I work for CocaCola and then quit. Can I buy coke shares the next day? (substitute any other company for Coke)

Please give a reference to the rules you find. I couldn't find any specific to once you leave a company only to things like stock options etc.