I’m not sure about the practical reality, but in theory, it doesn’t require a new interpretation. 61.113(a) states a general rule. (b)-(h) states a series of limited exceptions to it. Leaving out the issue of the legislation on volunteer pilots, all it takes is rulemaking deleting (b)-(h) and we’re left with.
61.113 Private pilot privileges and limitations: Pilot in command.
(a) Except as provided in paragraphs (b) through (h) of this section, no person who holds a private pilot certificate may act as pilot in command of an aircraft that is carrying passengers or property for compensation or hire; nor may that person, for compensation or hire, act as pilot in command of an aircraft.