b. “Propellants” as follows: 1. Any solid “propellant” with a theoretical specific impulse (under standard conditions) of more than: a. 240 seconds for non-metallised, non-halogenised “propellant”; b. 250 seconds for non-metallised, halogenised “propellant”; c. 260 seconds for metallised “propellant”; 2. This entry is not used; 3. “Propellants” having a force constant of more than 1,200 kJ/kg; 4. “Propellants” that can sustain a steady-state linear burning rate of more than 38 mm/s under standard conditions (as measured in the form of an inhibited single strand) of 6.89 MPa (68.9 bar) pressure and 294 K (21 C); o 5. Elastomer Modified Cast Double Base (EMCDB) “propellants” with extensibility at maximum stress of more than 5% at 233 K (-40 C); o 6. Any “propellant” containing substances specified in ML8.a.; 7. “Propellants” not specified elsewhere in this Schedule, specially designed for military use.