 The plan version is independently motivated. Note that this version puts a normative constraint on the plan that one has at each time when one has a plan, whereas the standard version constrains the act of credence change across different times. So the plan version is different from the standard, act version. But it turns out to be the former, rather then the latter, that is supported by the major existing arguments for the Principle of Conditionalization. See, for example, the Dutch Book argument by Lewis (1999), the expected accuracy argument by Greaves &amp; Wallace (2006), and the accuracy dominance argument by Briggs &amp; Pettigrew (2020).