I recall there being one on the DGA or Writer's Guild site somewhere.
It gave all the normal stuff, but here's what we provide.
1. client name
2. spot title
3. total run time
4. producer's name
5. director's name,
6. audio structure (IE, left and right channel stereo, mono-mixed, etc.)
7. the obligatory contact information
8. a breakdown of the content (IE, :30 of bars & tone, :30 slate, :10 identification, :10 countdown and :30 spot followed by :15 of black).
This is what we have always supplied and we have NEVER been asked to provide more. In fact, I noticed at least one of our prefered outlets suggesting our format to another production studio...so it must be meeting their requirements. Some might see this as overkill, but being ahead of the curve has its benefits.