The GCR states that there should be a diagonal bar inside the rear roll hoop

“Main roll hoop (behind the driver) shall extend the full width
of the driver/passenger compartment and shall be as near the
roof as possible. It shall incorporate a diagonal lateral brace
to prevent lateral distortion of the hoop (See Figure 8). Any
number of additional reinforcing bars are permitted within the
structure of the cage.”

My question is, does the diagonal bar have to span the entire width of the roll hoop?
Looking at it from the front, is what shown below legal?

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Thanks