Thanks, Karl. It seems to compile almost perfectly. The only issue I found is that the TUGBoat volume and number were printed on each generated page (for example, for footnotes), and it incorrectly handled paragraphs. I've fixed this issue; it is now printed only on the first generated page.

I've updated latex.4ht to support cmd hooks for \@sect and \@ssect, so your MWE now compiles without errors. The updated file is attached.

Do you have a full example document that shows use of the class? I think we should add a proper support for it.

(file #543)

I think we should add support for hooks. It seems we could use something like:

\NewHookWithArguments{cmd/@sect/before}{8}
\NewReversedHookWithArguments{cmd/@sect/after}{8}
\NewHookWithArguments{cmd/@ssect/before}{5}
\NewReversedHookWithArguments{cmd/@ssect/after}{5}

And then use something like this in our redefinitions of \@sect and \@ssect:

\UseHookWithArguments{cmd/@sect/before}{8}{##1}{##2}{##3}{##4}{##5}{##6}{##7}{##8}%

I've added this code and it seems to suppress the error and also execute the hooks.

tex4ht seems to be incompatible with ltugboat.cls

Minimal example

```
\documentclass[final]{ltugboat}

\begin{document}
Example

\end{document}
```

Compilation command
```
htlatex example.tex "xhtml,html5,charset=utf-8,fn-in" " -cunihtf -utf8"
```

Error message:
```
! LaTeX hooks Error: Generic hooks cannot be added to '\@sect'.

For immediate help type H <return>.
...

l.4 \begin{document}

?
! Emergency stop.
...

l.4 \begin{document}

No pages of output.
Transcript written on example.log
```

The log is attached