Can you reproduce Phal x self?

[uwodahikamama]

My question is 2 part, and I haven’t seen an answer online.
I have some Phals that are currently only carried by one specific nursery. I believe they imported one and then the other is a cross they made themselves.
Am I able to use these plants to make a new cross? I guess technically and legally.
Also am I able to cross the import by itself by just pollinating one of the flowers on the plant? Are there reasons this may not work, like genetics? Legal reasons because only this place carries the plant?
I’m not sure if there are restrictions on propagation, either genetically or legally.