Historically, changes have been made to rules and this one in particular to solve problems. The required mini came about to solve the problem of some players taking advantage of flipping the disc more than once. Note that in the
1982-3 rule book and before, your lie was the circle the diameter of a disc behind the mark. As a side note, you had to plant on the tee pad within 12 inches behind the front line upon release AND have both feet on the pad at the time of release, i.e., stand & deliver.
In the next
rule book (1986), they changed your lie to 15 cm either side of the centerline behind the mini. So 30cm wide LOP which happens to be the max width of an approved disc. Note that they forgot to pin down how far behind the mini you needed to plant upon release. (Oops!). However, perhaps 1 meter was considered the default behind the mini because you had to plant within 1 meter of the front line upon release (extended from 12 inches in 1982).
In the next
rule book (1990), the lie behind the mini was changed to our current 30cm with a "no width" LOP. No change in this rule in the next 1997 rule book.
The next
rule book (2002) incorporated the speed of play rules temporarily put in place for the 1999 Worlds by Competition Director, Mark Ellis, because the format was to play 4 courses, 4 times per day with 3-somes. This way, up to 432 players could get 8 preliminary rounds played in 4 days. Providing the option to leave your thrown disc on the ground as your marker was seen first, as faster than marking with a mini, and second, a nice strategy option to maybe get back a bit more from a vertical obstacle or water/mud.
Nothing in this rules area has changed since 2002. Now, we have the proposal for tail marking to solve the problem of two lies and as a side benefit would then allow the player to pick up their thrown disc and still get the benefit of its marking location which is not currently allowed. My suggestion made earlier that goes beyond tail marking, pretty much integrates all of the incremental changes made over the years:
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Your thrown disc can still be the mark without touching it: Speed of play
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If you touch your thrown disc, you are replacing it with another disc: Prevents disc flipping
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Back edge of thrown disc is front of lie: Sometimes more space for stance or throwing motion vs marking in front.
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Return to 21 to 30 cm width for line of play behind mark: Regains original tradition and easier for players to hit mark
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No minis required (but could be optional): One less special item needed for rec play