Actually, you can see by the photo that there is no bike lane or shoulder in this location. Most of the base doesn't have actual bike lanes but shoulders that come and go. Some shoulders are not in any condition to ride on. One leaving the base at Las Pulgas has a huge tree root that is shaded by a tree where there was a recent crash.
Whatever the rules are on the base, the law everywhere else is that when a lane is too narrow to share side by side the safest and legal way to ride is to control the lane so that a bus doesn't try to pass in the same lane. (for example, notice the sharrows in encinitas centered in the lane to educate both drivers and cyclists to the safest place to ride.) They just can't fit and, even if they were to move over a little, if a car comes around a blind curve in the other direction they would squeeze any cycists into the guard rail. You should always control a lane like this which is too narrow to share. It is not responsible to do otherwise.