Comparable call guidelines
I remember reading a document about comparable calls that gave guidance in how much leeway we have.
For example it said that point ranges could be considered similar if one wasn't a subset of the other but the overlap was big enough as a proportion - for example a 15-17 range was close enough to a 16-18 range, but not to a 17-19 range.
There were other things about suit lengths too.
I now can't find this document. There is some (good) stuff in the commentary to the 2017 laws, but I don't think that's what I read.
Assuming I haven't dreamt this, does anyone know what document I'm referring to, and can they point me to it?
Thanks.

Comments
I think the document you're thinking of is here: https://www.eurobridge.org/wp-content/uploads/2018/02/Comparable-Call.pdf
I'm not sure how "official" a status it has – it's on the EBL website (and linked from the EBU website) and appears to have been written based on a proposed version of Law 23 before the 2017 Laws were finalised.
I think you're right.
Thank you!
Also worth noting that it was written by the long-serving Chair of the WBF Laws Committee.
You're right to question the status of the document. The guidance on law 23C is certainly at odds with the current WBFLC interpretation.
I don't think it should be left for unsuspecting eyes to view without a very clear disclaimer.
Wher can I find the "current WBFLC interpretation"?