I tried to figure out what control points were:
[
trn.trains.com]
"This authority protects the recipient's use of a designated track between locations where signals are controlled by the dispatcher (called control points)."
I must have gotten dumber than usual in old age but I cannot grasp how this relates to a requirement for catenary in base tunnels. In any event I think you have an ideological and statutory problem here in that PB would not accept diesel at Palmdale as not in accord with the stipulations of Prop 1a.
Of course they could always get a last-ditch "due to lack of funds we cannot use this trackage any other way" dispensation or indulgence from a bendover machine judge(as with presumably diesel San Jose to Wasco deadend or connected somehow to Amtrak)and just ignore Prop 1a as if it weren't even there. SOP
Alternatively you could ask what if they definitively threw out Prop 1a and its provisos. So they decided to build out their blessed Tehachapi alignment and simultaneously to replace the ancient Loop line. How would you lay out such a line to eliminate the bottleneck and yet keep acceptable gradients for heavy freight? Travel times no longer the determining factor.