Field help (MDRDATACT) 

Field reserved to the Polish legislation and submitted to the KPL activity code.
This date, loaded by default with the start date of the current period of the Accounting and Financial context is used to determine the effective date of the improvement.
The date entered must be situated between the start of the current fiscal year and the end of the current fiscal year of the plans to improve context. If an improvement has already been carried out on the current fiscal year, this date must be greater than the effective date of this improvement.