The player will play the BØ in bar 10 and bar 6 after Letter C at the start of the bar unless you use a slash (/) to continue the Bb.

Bar Repeat Signs, Slash, N-C- - Example - Example

The 3 bar repeats after C are confusing. Do you mean to repeat |F7 Bb| 3 times?
It would be more clear to me if chord(s) were entered in the bar after C.

Here's a chart including the verse

He Ain't Got Rhythm - Irving Berlin

Copied from score here:
https://jscholarship.library.jhu.edu...e/1774.2/24997

Thanks for sharing your chart
)BOB