In this case, the court seems to be following the letter of the law.

The number should start with two letters followed by seven numbers.

"We have and will continue to follow the letter of the law," she said.

She follows the letter of the rules at all times.

The symbol is made up of two letters followed by a number.

For example more than one state uses the standard three letters followed by four numbers.

It's well past time that people follow both the letter and spirit of the law.

He had done no wrong, followed the letter of the law, was respectable.

The format is 2 or 3 letters followed by 4 numbers.

Now they've got the initial letter followed by the number then the letters.