There is a chart in 1420.1B on page 4-3. For the designators "SWO (EDO Option)," "Special Warfare," Nuclear Power Instructor" and "EOD" it says 29 with waiver up to 24 months. Next to the "24 months" there is a footnote. Footnote (1) states that waivers are considered on a month-for-month basis for prior active service. In addition to the "24 Months" and the footnote (1), there is also a "/Up to age 35." So, taking all this together, I read this to mean that the age limit was 29, with up to 24 months waiverable for
anyone and then additional month-for-month waiver for prior enlisted service, up to age 35. Otherwise, what would be the point of saying that the age limit is 29 with 24 months waiverable (i.e., 31) and then "up to age 35"?
In the same chart, it says that the age limit for SWO is 29 with waiver consideration of 24 months and then it has the same footnote, footnote (1). So I interpreted this to mean that the age limit was 29, waiverable up to 24 months, and then additional waiver on a month-for-month basis for prior active service up to whenever. So I went to my recruiter telling him I wanted to apply for SWO and he said I wasn't qualified based on age.
@NavyOffRec then sent me the SWO program authorization from April 2014 and it states that the age limit is 29, waiverable up to 24 months on a month-for-month basis for prior active service. I was very disappointed. But that's what I get for lawyering it.
I don't know if there is a more recent version of 1420.1B out there that I'm not aware of, but I would be careful with some of the information contained in there and look more to the program authorizations which seem to be updated more frequently. I compared several of the recent program authorizations and the age limits were different. I don't mean to downplay the importance of 1420.1B though, it is still a wealth of important information.