Layoff after I 140 applied before 485

[LC_Romantic]

1. If the company rehires after 1 month and the employee has not taken any other jobs,how do they hire the person? just a regular hire or you have to go through the whole process of H1?
2. Can the employee restart the process from I 140? or all over again.

 

[phonon]

lay off -> new job -> spin off

I was laid off after my I-140 was filed by my previous employer (company A). I found a new job and did my H1 transfer. Now the company A is planning to spin off one of its division. If I am hired by the new spin-off company, can I re-use my laber certificate and I-140 filed by company A ?

Thanks a ton.