I plan to go RTW starting Seoul next March.
After the reservation is made by either travel agent or airline itself(I use JAL Office), is there time limit of ticketing after the reservation?
Such as "Ticket must be issued within 7 days after reservation"

We want to wait for ticketing until next year because fuel surcharge will be less after Jan 1.
ALso, since I am going Seoul next week, I will change US$ to Korean Currency at this time(make banker's check rather than change to bills).
I know I could lose some if US$ is getting stronger by the ticketing time, but the current rate is good enough for me.

Thanks in advance