This invention presents a wireless UWB-based space-time networks communication that is used to utilize a larger number of sensor nodes in commercial, potentially hostile, and militarily sensitive environments. The vehicle clearance policy specifies that a vehicle must receive, in response to a clearance request message, an affirmative response message from a control center external to the vehicle, before executing a movement associated with the affirmative response message. The closure mechanism also includes a male closure element including a proximal base portion extending from the second wall, a neck portion forming male sealing surfaces to engage the female sealing surfaces, and a distal head portion. Relatively thinner and thicker Belleville springs are used in series to produce a progressive rate spring.