Originally Posted by
zzuf
The requirement for fuel jettison capability has nothing to do with the concepts MTOW and MLW, and everything to do with climb performance at MTOW less a bit for fuel burn specified in FAR25.1001.
Thanks for taking me out of context to show your familiarity with certification and design requirements.
The point remains the OP should familiarise themselves with why medium sized aircraft circle after departure before a non life threatening return. MTOW and MLW will be enough for aviation journalism 201.