Rule 8.6: External declaration without definition

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I have a header file MISRA_8.6.h, in which a variable is declared:

Code:

extern signed short int Variable;

And I have the corresponding c-file MISRA_8.6.c, which uses the variable as input.

Code:

#include "MISRA_8.6.h"

signed short int A;

void main(void)
{

    /*8.6*/
    A = Variable;
    
}

The c-file defining the variable is out of scope. Is rule 8.6 violated by this setting or is another rule 8.x violated?