Note: We worked with our local authorities various departments as well as our engineer prior to submitting plans. For some of us, this is a “first”. Supply them with books and articles that are helpful and you do the research. I emailed Owen on a regular basis over the past 2 years, and always got a reply within better than 24 hrs. The support and backup is what we all need. This comes with the package when you purchase the plans. These resources are low cost and should be one of your best avenues of getting compliance with codes for your area.