1. A taxable person, whether or not established in the Member State granting the exemption provided for in Article 284(1), shall not be able to benefit from that exemption during a period of one calendar year where the threshold laid down in accordance with that paragraph was exceeded in the preceding calendar year. The Member State granting the exemption may extend this period to two calendar years.
Where, during a calendar year, the threshold referred to in Article 284(1) is exceeded by:
(a) not more than 10 %, a taxable person shall be able to continue to benefit from the exemption provided for in Article 284(1) during that calendar year;
(b) more than 10 %, the exemption provided for in Article 284(1) shall cease to apply as of that time. Notwithstanding points (a) and (b) of the second subparagraph, Member States may set a ceiling of 25 % or allow the taxable person to continue to benefit from the exemption provided for in Article 284(1) without any ceiling during the calendar yea
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