Originally Posted by
petaluma1
I am of the understanding, perhaps incorrect, that FSD's can loosen up on security but they can tighten up on it.
I think that there is a word missing in your statement.
I found the cite from the Screening Management SOP. I don't know if it has changed, but except in very limited circumstances, the FSD may not unilaterally change the TSA SOP to make it more restrictive. For example:
4.3.19. EXERCISE OF FSD DISCRETION
Situations may arise which merit a temporary, short-term deviation from established security procedures. Where an articulable risk-based assessment supports a temporary deviation from such procedures, an FSD only (or the Acting FSD) has the authority to proceed as good judgment warrants.
A. An FSD (or Acting FSD) must be prepared to provide a well-reasoned justification for any deviation. For instance, where the presence at the checkpoint of an elected official or other trustworthy person of notoriety has the potential of creating a distraction that might lessen security, escort of the passenger and accompanying family members directly into the sterile area might be justified.
B. An FSD (or Acting FSD) should not exercise the discretion to deviate from established procedures where any doubt exists that aviation safety or national security might be compromised. Where such doubt exists, prior approval of the Area Director should be obtained.