What does "current to one year" mean? [closed]

I saw in a graduate admission webpage English Language Proficiency Requirements that the TOEFL score date is "current to one year". What does the phrase mean? Current until last year?

If you click through the link on the page that you linked to, you will reach a paragraph English Placement Test Requirements for ALL Students where it says

Students who submit official scores, current to within one year, of 90 or higher on the Internet-based Test of English as a Foreign Language TOEFL (iBT), or an equivalent score on earlier versions of the TOEFL, are excused from English Placement Tests except for tests of written and spoken English.

Current to within one year means results that have been obtained within the last year. Reading between the lines, it seems that scores are calculated differently now than they used to be (hence "equivalent" score). It's not very obvious though what they are trying to say. Maybe someone more familiar with the TOEFL system needs to answer.