Template:Certification Table Entry/Sales/PolishPeriod

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This helper template calculates periods for Polish certifications, according to the sources from ZPAV article:

• The dates for the changes up to 2010
• Removing the foreign/domestic distinction in June 2015

References

It returns:

Before April 1997	Before June 2002	Before June 2004	before June 2006	Before June 2015	Before 2025	From 2025
1	2	3	4	5	6	7

Returns 0 if the data provided is not sufficient.

The above documentation is transcluded from Template:Certification Table Entry/Sales/PolishPeriod/doc. (edit | history)
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