DPP Invited and Review Talks: 3-year rule (November 1996)
An individual may present an invited or review talk (exclusive of special sessions or evening symposia) at the annual DPP meeting no more than once every three years; i.e., two years must intervene between two invited or review talks presented by the same person. An exception may be granted by the Program Committee Chair.
DPP Tutorials: 3-year rule (May 1998)
Tutorials will be treated by the 3-year rule, but under exceptional circumstances, the Program Committee Chair may make an exception.
The DPP Annual Meeting Scientific Programs can be found on this page https://www.aps.org/meetings/baps/ starting in 1994. The APS Bulletins that include the DPP Invited Speakers can be found on the same page starting in 2005.