Trying to use glossaries with isov2

Here is a minimum working sample using renewcommand{glossarysection}[2][]{} as suggested in another thread:

documentclass[a4paper,oneside,12pt]{isov2}
usepackage[UKenglish]{babel}
usepackage{lipsum}
usepackage[toc,acronym,nonumberlist]{glossaries}
makeglossaries
newglossaryentry{accreditation}{name={accreditation},
    description={procedure by which an authoritative 
    body gives formal recognition that a body or person is
    competent to carry out specific tasks [ISO/IEC Guide 2]}}
newglossaryentry{latex}
{
    name=latex,
    description={Is a mark up language specially suited 
    for scientific documents newline [Latexbook]}
}
newacronym{dc}{d.c.}{direct current}
newacronym{ac}{a.c.}{alternating current}
newacronym{DC}{DC}{direct current, d.c. is preferred}
newacronym{AC}{AC}{alternating current, a.c. is preferred}
begin{document}


clause{Terms, definitions and abbreviations}
renewcommand{glossarysection}[2][]{}
glsaddall
sclause{Terms and definitions}
printglossary
sclause{Abbreviations}
printglossary[type=acronymtype]
clause{Section}
lipsum[1-30]
end{document}