Each verse has the same melody and lyric
Corresponding lines in every verse contain the same number of syllables
Each verse contains eight lines of lyric (eight or sixteen musical bars)
If the first verse includes a pre-chorus, all subsequent verses also include a pre-chorus section
The chorus contains four or eight lines of lyric (eight or sixteen musical bars)
Each chorus has the same melody and the same lyrics
The title appears at least once in the chorus
If there is a bridge, it contains two or four lines of lyric (four or eight musical bars)
The bridge (if applicable) does not include the song title
The instrumental solo (if applicable) is no more than eight bars long