I'd say the days of the one-(wo)man scheme where the Trustees are the directors of the company may be numbered.
Simply signing a trustee training document to say that you've read it won't suffice. Much in the same way the Central Bank would prefer less intermediaries to regulate, the Pensions Authority would like less Trustees.
It's likely that the product provider may take over the responsibility/cost of the Trusteeship. If they don't, the one-(wo)man schemes may have to farm that out at an estimated annual cost of €350 per annum.
If you're in the market for an Executive/Directors Pension, you should probably buy one where the product provider will manage the Trustee responsibility, at no extra cost.