This section applies to any action for damages for negligence, other than one to which section 11 of this Act applies, where the starting date for reckoning the period of limitation under subsection (4)(b) below falls after the date on which the cause of action accrued.
Section 2 of this Act shall not apply to an action to which this section applies.
An action to which this section applies shall not be brought after the expiration of the period applicable in accordance with subsection (4) below.
That period is either—
For the purposes of this section, the starting date for reckoning the period of limitation under subsection (4)(b) above is the earliest date on which the plaintiff or any person in whom the cause of action was vested before him first had both the knowledge required for bringing an action for damages in respect of the relevant damage and a right to bring such an action.
In subsection (5) above "the knowledge required for bringing an action for damages in respect of the relevant damage" means knowledge both—
For the purposes of subsection (6)(a) above, the material facts about the damage are such facts about the damage as would lead a reasonable person who had suffered such damage to consider it sufficiently serious to justify his instituting proceedings for damages against a defendant who did not dispute liability and was able to satisfy a judgment.
The other facts referred to in subsection (6)(b) above are—
Knowledge that any acts or omissions did or did not, as a matter of law, involve negligence is irrelevant for the purposes of subsection (5) above.
For the purposes of this section a person's knowledge includes knowledge which he might reasonably have been expected to acquire—
but a person shall not be taken by virtue of this subsection to have knowledge of a fact ascertainable only with the help of expert advice so long as he has taken all reasonable steps to obtain (and, where appropriate, to act on) that advice.