My group got very excited over the idea of buying bumper stickers for their Class IV starship at every portal they jumped through.

Page 139:One thing that doesn't seem to be made quite explicit: Are portal jumps one system at a time? So that you renew your roll/payment/calculations for every stop on your route to a distant system?
Or do you calculate/pay/roll once for an entire trip with several intermediate stops?
Another way of putting it: From Menkar, you can only jump to Daybul? Whereas from Kua, you can reach Aiwaz, Altai, Hamura and Caph (but only those with one jump)?
It seems overly restrictive to jump one stop at a time, but perhaps too 'cheap' to reach any-from-any (and why the chained routes then?).
I'm thinking of house-ruling this unless anyone has a definitive answer with rules refs.
Hope I've missed something obvious!