Requirements, limits and deadline for application
1. Requirements
Port authorities must keep appropriate accounting records and specific documents to identify the expenses and investments to which the deduction is applied.
2. Limits
This deduction is excluded from the 25 and 50 percent limits referred to in article 39.1 of the LIS . This deduction will not be taken into account for the purpose of the calculation of the aforementioned limit.
3. Deadline for application
Amounts not deducted in the tax period may be applied in the settlements of the tax periods that conclude within the next 15 immediate and successive years .