How to determine date that an ETF must be owned to be eligible for the dividend payment?

According to Investopedia.com:

Similar to an individual company’s stock, an ETF sets an ex-dividend
date, a record date, and a payment date. These dates determine who
receives the dividend and when the dividend gets paid.

Source: https://www.investopedia.com/articles/investing/120415/how-dividendpaying-etfs-work.asp

Investopedia does not go into great details for ETFs, but that page directly links to another Investopedia page regarding equity dividends, which states:

The ex-dividend date or "ex-date" is the day the stock starts trading
without the value of its next dividend payment. Typically, the
ex-dividend date for a stock is one business day before the record
date, meaning that an investor who buys the stock on its ex-dividend
date or later will not be eligible to receive the declared dividend.
Rather, the dividend payment is made to whoever owned the stock the
day before the ex-dividend date.

Source: https://www.investopedia.com/terms/e/ex-dividend.asp

And yet, when looking at the prospectus for the popular SPDR DIA ETF (which tracks the Dow Jones Industrial Average, DJIA), it seems to state just the opposite:

The regular monthly ex-dividend date for Units is the third (3rd)
Friday in each calendar month, unless such day is not a Business Day,
in which case the ex-dividend date is the immediately preceding
Business Day (“Ex-Dividend Date”). Beneficial Owners reflected on the
records of DTC and the DTC Participants on the first (1st) Business
Day following the Ex-Dividend Date (“Record Date”) are entitled to
receive an amount representing dividends accumulated on Portfolio
Securities through the monthly dividend period which ends on the
Business Day preceding such Ex-Dividend Date (including stocks with
ex-dividend dates falling within such monthly dividend period), net of
fees and expenses, accrued daily for such period. … The payment of
dividends is made on the Monday preceding the third (3rd) Friday of
the next calendar month…

Source: SPDR DIA ETF Trust Prospectus (2020), page 61 (emphasis added)
https://www.ssga.com/library-content/products/fund-docs/etfs/us/ps/DIA_PROSPECTUS.pdf

It sounds like SPDR DIA ETF does not pay any dividends to fund owners who own the ETF on the day before the ex-dividend date, contrary to Investopedia. Furthermore, it sounds like they only pay dividends to fund owners who own the fund the day after the ex-dividend date, which seems completely backwards.

What’s going on here? Does this ETF break typical conventions, or is this common? Perhaps there a fundamental principle missing from this analysis? How would one be aware of this without wading through the entire 80 page prospectus?