undergoing road tests for technical development, repair or maintenance purposes, or the drivers of new or rebuilt vehicles which have not yet been put into service;
atá i mbun tástálacha bóthair maidir le forbairt theicniúil, chun críocha deisithe nó cothabhála, nó tiománaithe feithiclí nua nó atógtha nár cuireadh i seirbhís go fóill.