What are intact stability criteria for timber deck cargo ship?

For timber deck cargo ship:

For ships loaded  with  timber  deck  cargoes  and  provided   that  the cargo  extends  longitudinally   between  superstructures   (where  there  is no  limiting  superstructure   at the after  end,  the timber  deck  cargo  should extend  at least to the after end of the aftermost  hatchway)  transversely for the full beam of ship after due allowance   for  a  rounded   gunwale   not  exceeding   4%  of  the  breadth   of  the  ship  and/or   securing  the supporting  uprights  and which  remains securely fixed at large angles of heel, the Administration   may apply the following   criteria .

  1. The area under the righting  lever curve (GZ curve) should  not be less than 0.08 metre-radian  up to e = 40°  or the angle of flooding   if this angle is less than 40° .
  2. The maximum  value  of the righting  lever  (GZ)  should  be at least 0.25  m .
  3. At all times during  a voyage,  the metacentric  height  GMo   should  be positive  after correction  for the free surface effects of liquid  in tanks and, where  appropriate,  the absorption  of water  by the deck  cargo  and/or   ice accretion  on the  exposed  surfaces.

Additionally,   in the departure condition the metacentric  height should be not less than  0.10  m.