The Building Codes Division is voting to include alternative stairs and sleeping lofts in their building code and to address the scope of housing size, as well as fire safety and energy requirements for small houses.
https://content.govdelivery.com/accounts/ORDCBS/bulletins/1c9a82f
If you live in Oregon, please attend the meeting and give public comment in support of tiny houses or send your comments to Richard Baumann, Rules Coordinator, at Richard.J.Baumann@Oregon.gov, or to P.O. Box 14470, Salem, OR 97309-0404 before December 15.