You may contact the SPAA secretary with questions about the electronic submissions process when other avenues fail.
All electronic submissions must be in PDF format and prepared for 8.5 x 11 inch paper (US letter size). The cover page should include
Submissions of regular presentations should include the cover page followed by an introduction understandable to a nonspecialist including motivation and previous work, and a technical exposition directed to a specialist. It should not exceed 10 pages in 11-point font or larger (excluding the cover page and the references). More details (such as figures and proofs) may be supplied in a clearly marked appendix to be read at the discretion of the program committee. Submissions for the SPAA brief announcements should be no longer than 3 pages (excluding the cover page) on letter-size paper using at least 11-point font. Papers significantly deviating from these guidelines risk rejection without consideration of their merits.
For authors who are not sure about the right format, a simple Latex template can be accessed here.