This section applies where a company has made a political donation or incurred political expenditure without the authorisation required by this Part.
The directors in default are jointly and severally liable—
The directors in default are—
the directors of the relevant holding company.
For the purposes of subsection (3)(b) a "relevant holding company" means a company that, at the time the donation was made or the expenditure was incurred—
Where only part of a donation or expenditure was unauthorised, this section applies only to so much of it as was unauthorised.