No.

Structural subject

Bar

Microstructure

1

Section I

1 - 17

a:3 + a1:5 + a2:4 + cadence and cadence segment: 1 + 4

2

Section II

18 - 24

2 + 2 + 3

3

Section III

25 - 48

With elements of a and a1 of the first section

4

Section IV

49 - 63

a type of repetition with elements from the previous sections