In Line Meaning

(not comparable) assuming a position in the future.

Example:   "[Plant] rescues are usually organized by local garden clubs, but before you grab your shovel and head for the door, check with local government agencies to make sure you're in line with regulations." — "Garden Superheroes," Garden Gate, Jan/Feb 2006, Issue 67, p.45
  Please stand in line for the pledge of allegiance.
  He's third in line to be president.
  He's in line to be the fastest runner of all time.
  He's in line to be the next champion.