What does the provision mean?

Does this

The said George D. Morse shall and will pay to the said trustee in trust for his said minor son Richard the sum of twelve hundred dollars ($ 1,200) per year, payable in equal monthly installments on the first day of each month until the entrance of Richard D. Morse into some college, university or higher institution of learning beyond the completion of the high school grades, and thereupon, instead of said payments, amounting to twelve hundred dollars ($ 1,200) yearly, he shall and will then pay to the trustee payments in the sum of twenty-two hundred dollars ($ 2,200) per year for a period of said higher education but not more than four years'

mean George has to pay $1200 a year while Richard is in the army?

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