Whether the contribution period had to be extended by the full duration of self-employment or only by the part falling within the ordinary contribution reference period.
Only the duration of self-employment occurring during the ordinary contribution reference period counts toward the extension; the fund correctly limited the extension accordingly.
The court held that the two-year maximum extension must logically cover only the period during which the insured was actually prevented from contributing within the ordinary contribution period. Relying on the structure and purpose of Art. 9a LACI, it rejected the appellant's broader interpretation.