You can have multiple runs on the same play and the "WHEN" of penalty enforcement will dictate the basic spot. Examples:
(1) A1 runs from A's 10 to A's 20 and fumbles;
(2) A2 scoops up fumble @ A's 30 and journeys for TD;
(3) BIB on A3 flagged @ A's 40;
(a) before A2's recovery = basic spot, A's 20 - spot of fumble;
(b) after A2's recovery = spot foul, A's 40 under ABO.
It was felt that adding "related" would provide rule support and clarity for situations such as this.
PS : Roamin' Umpire, where did you find the Guinness (my favorite drink) !!