This paper defines boundary conditions derived from the basic physics of fusion and applies them to both laser driven and acoustically driven Inertial Confinement Fusion (ICF). Several experimental and theoretical papers, in addition to some patents, hold open the promise of acoustically driven ICF. There are several factors common to both drivers that must be taken into account. In particular, it has been observed in laser driven ICF plasmas that criteria on the ion temperature, the confinement time, the core density, and the minimum core radius must be satisfied to achieve fusion. The relationship of these criteria to acoustically driven inertial confinement will be discussed.