Add the following keyword under SHOW_OPTIONS:

   keyword LOAD_AVERAGE, syntax=SHOW_LOAD_AVERAGE

Define the following syntax:

define syntax SHOW_LOAD_AVERAGE
   image show_load_average
   parameter P1, label=OPTION
      value (required)
   qualifier OUTPUT, default
      value (default="SYS$OUTPUT",type=$file)
   qualifier HOGS
   qualifier CLUSTER
   qualifier NODE, nonnegatable
      value (list)
   disallow (CLUSTER and NODE)