— by 1 January 1974 at the latest, each charge shall be reduced to 60 % of the rate applied on 1 January 1972;
— lá nach déanaí ná an 1 Eanáir 1974, tabharfar gach muirear anuas go 60% den rata a chuirfear chun feidhme an 1 Eanáir 1972;