The following is probably the set of those papers at the conference which address some aspect(s) of Reasoning about Actions and Change.
Koehler, Jana: Correct Modification of Complex Plans. Topics: [planning]. Code: [Koehler94A].
Doherty, Patrick: Reasoning about Action and Change using Occlusion. Topics: [categorization]. Code: [Doherty94A].
Chittaro, Luca, Angelo Montanari, and Alessandro Provetti: Skeptical and Credolous Event Calculi for Supporting Modal Queries. Topics: [knowledge]. Code: [Chittaro94A].