Equality of the characteristic sheaves of E and the restricted tableau

Let $(M,\mathcal{I})$ be an involutive exterior differential system. Let $E$ and $\dot{A}$ denote the tableaux introduced in the surrounding discussion, and let their characteristic sheaves be defined on the common cotangent space. Characteristic-sheaf equality conjecture. The characteristic sheaf of $E$ equals the characteristic sheaf of $\dot{A}$. This conjecture is proposed as a way to establish a general equivalence between $\dot{A}$ and $E$; the supplied text gives no resolution.