<Li> The * (star) Integrity Property states that a subject at a given level of integrity must not write to data at a higher level of integrity (write down). </Li> <Li> Invocation Property states that a process from below cannot request higher access; only with subjects at an equal or lower level . </Li> <Ul> <Li> In FreeBSD, the Biba model is implemented by the mac_biba MAC policy . </Li> <Li> In Linux, the Biba model is implemented in the General Dynamics Mission Systems PitBull product . </Li> <Li> In XTS - 400, the Biba model is implemented in the BAE Systems's XTS - 400 operating system . </Li> </Ul> <Li> In FreeBSD, the Biba model is implemented by the mac_biba MAC policy . </Li>

Which of the following rules violates the principles of the biba integrity model