m[
  ## Capture, starting with '20', one date, and 3x %8.2 floats
  ( 20 $re_date $re_float{3} )

  ## Capture, starting with '40', one date, '(', non-')' to the ')'
  ( 40 $re_date \( [^)]+ \) )

  ## Capture, '50', a date, everything to the end of line.
  ( 50 $re_date .* $ )
]x; ## ignore whitespace.