1 January 1982: Date of RTC incorporation, and therefore date for "reference" of the Addendum, as well as allegedly intended "effective date" of "the document" (whether of the Addendum alone or of the entire Assignment plus Addendum, Lenske does not specify, but it must include both).

19 January 1982: Date of announcement of new "Advanced Technology levels, known as New OT VIII through New OT XI" which were added to the Assignment by the Addendum. This date was put on the Addendum allegedly to reflect when those Advanced Technology levels were announced, and therefore became effective in relation to the Assignment.

10 May 1982: Date that L. Ron Hubbard purportedly signed the Assignment itself (but not the Addendum, which was created later and back-dated to both 1 January and 19 January 1982, as above). This is the earliest date of execution by any party, and so this is the date where we place this document in chronology.

16 May 1982: Date that Glen and Laura Marlowe signed the Assignment itself as representatives of RTC (but not the Addendum, which was created later and back-dated to both 1 January and 19 January 1982, as above). Note that this is the date written at the top of the Assignment itself. According to Sherman Lenske, Glen Marlowe "inadvertently filled in" this date, omitting the year.

Circa 1 July 1982: Approximate date on which the Addendum was actually created and executed by "L. Ron Hubbard" and Glen and Laura Marlowe. Lenske only says the Addendum was created and executed "a month or two" after the Assignment itself. A month would be around 15 June, two would be around 15 July, so we've split the difference.

This is the total explanation offered by Lenske for the incredible convolution of dates. No explanation is given for why the Assignment was not just executed on the so-called "intended" effective date (1 January 1982), or for why the "new" Advanced Technology (AT) levels were not included in the original Assignment (since they had been released for four months when it was executed on 10 May 1982), or for why it took a "month or two" for anyone to realize that the "new" AT levels had been left off of the Assignment. Lenske claims in his Declaration that it was an "oversight."

For more information, see the original "Assignment Agreement" of 10 May 1982, which does include this Addendum. But here it is separately, presented at the approximate it is purported to have been signed by L. Ron Hubbard.