Regular Polygonal Complexes of Higher Ranks in $\mathbb{E}^3$

The paper establishes that the rank of a regular polygonal complex in $\mathbb{E}^3$ cannot exceed $4$, and that the only regular polygonal complexes of rank $4$ in $\mathbb{E}^3$ are the eight regular $4$-apeirotopes in $\mathbb{E}^3$.
The article is published in the author's wording.