Masonry filled cells with rebar above and below window openings (Florida Residential Construction)

[Eng.V-C]

Is it neccesary to have masonry filled cells with rebar above and below window openings? Is there any code requirement for that ?
I see some builders add them and some don't.

 

[EZBuilding]

Reinforcement at the sill and header generally allows for consideration of those elements as reinforced masonry.

If they are not reinforced, they would have to be justified as a non-reinforced section.

Typically in South Florida, I find that reinforced masonry is required for the high wind loads to meet strength and service requirements. At a 144 inch span, my gut feel would be that reinforcement is needed. The consideration for the header is made slightly more complicated if the masonry wall is load bearing.