Proposal to amend paras. 15.1.1. to 15.1.4. to change the transitional provisions and allow Contracting Parties to issue approvals according to the 05 series of amendments. As from entry into force of the 06 series, no Contracting Party shall refuse approval under the 06 series. As from 18 months after entry into force, no Contracting Party shall grant approvals unless the helmet or visor type meets the 06 series requirements. As from 30 months after entry into force, all Contracting Parties shall prohibit approval marks referring to type approvals granted under the preceding series. As from 36 months after entry into force, Contracting Parties may prohibit the sale of helmets and visors which do not meet the 06 series requirements.