If I could answer--and this is not my whip's language, this is the language from the actual rules of the committee. Let's use access to information as an example. It states that witnesses be given no more than 10 minutes for their opening statement--so multiple witnesses, one statement.
Agriculture and agrifood states that witnesses be given 10 minutes for their opening statement. In other words, the opening statement may have multiple witnesses associated with it. So I read that to mean 10 minutes total for the opening statement of the witnesses.
Canadian heritage states that witnesses be given up to 10 minutes for their opening statement. They all use similar language. Maybe I'll table this.