Question: their strategy was to approve all travel requirements via fax, with a directive to wait for a hard copy of the fax before going ahead with the booking.
Answer: --> Their strategy was to approve all travel requirements via fax, with a directive to wait for a hard copy of the fax before going ahead with the booking.

Question: the chassis is the truck’s backbone.
Answer: --> The chassis is the truck’s backbone.

Question: then came spring 2013.
Answer:
--> Then came spring 2013.