The statutes of a foundation states that at a maximum one third of the members of each body are ’employed’ by the same firm, organization, entity or one of its affiliate organizations. The candidates for the board elections had to declare their affiliation therefore in front of the elections.
Because this statements are very important for the composition of the board it’s necessary that every member of the board inform the foundation members and the public in the same way, once this affiliation changes later. The first statement usually was made in an email to a foundation mailing list. Thus the change needs also an email to the same list (and maybe to other foundation communication channels of the fundation).
And the information had to be send out by the person concerned very timely, which means in this case immediately. Are about four weeks for a short email notice immediately? In my opinion this is not the case.
A member of the leading body of a foundation, which has the goal of transparency and openness, should be able to write an email with such a short information latest the next day after the change in the affiliation. If she or he failed to do this should think about his workload and take responsibility for her or his behavior.