There were no guidelines, formal or informal, on when to summon a person to headquarters, he said.

Beyond the advertisements, the networks have all adopted formal or informal guidelines to avoid glorifying drug use on their programs.

Later Åsbrink took part in shaping the informal guidelines called the 'business code of ethics'.

By understanding why people use analogies, we can come up with some informal guidelines for using them properly.

The Bills have a players' committee to help set informal guidelines, but players said it took no special action this week.

Downvoting met with some controversy as users adjusted to the phenomenon, and set informal guidelines on usage.

But it's important to develop some informal guidelines.

Others abide by informal guidelines.

Treatment decisions often follow formal or informal algorithmic guidelines.

Sir Humphrey wishes him to oversee the planning inquiry relating to Hacker's project and lay down some "informal guidelines".