As advised a month or so ago, the following public comment period is open:
We have received a small number of responses which are accessible from that page.
The topic at hand and the specific questions that have been asked as part of the consultation are important ones; the decisions taken will have operational consequences to any user of the Internet who validates DNS responses with DNSSEC.
If you have experience, opinions or expertise to contribute, it would be greatly appreciated. The window for being able to submit comments closes on 12 April 2013 at 23:59 UTC.