▁mission ." ▁ ▁The ▁standard ▁art ic ulated ▁in ▁option ▁ 1 , ▁which ▁is ▁the ▁standard ▁applicable ▁to ▁most ▁sat ell ites ▁and ▁der el ict ▁upper ▁stages ▁launched , ▁has ▁come ▁to ▁be ▁known ▁as ▁the ▁" 2 5 - year ▁rule ." ▁The ▁US ▁updated ▁the ▁O D MS P ▁in ▁December ▁ 2 0 1 9 , ▁but ▁made ▁no ▁change ▁to ▁the ▁ 2 5 - year ▁rule ▁even ▁though ▁"[ m ] any ▁in ▁the ▁space ▁community ▁believe ▁that ▁the ▁time frame ▁should ▁be ▁less ▁than ▁ 2 5 ▁years ." ▁There ▁is ▁no ▁cons ensus ▁however ▁on ▁what ▁any ▁new ▁time frame ▁might ▁be . ▁ ▁In ▁ 2 0 0 2 , ▁the ▁European ▁Space ▁Agency ▁( ES A ) ▁worked ▁with ▁an ▁international ▁group ▁to ▁prom ul gate ▁a ▁similar ▁set ▁of ▁standards , ▁also ▁with ▁a ▁" 2 5 - year ▁rule " ▁applying ▁to ▁most ▁Earth - or bit ▁sat ell ites ▁and ▁upper ▁stages . ▁Space ▁ag encies ▁in ▁Europe ▁began ▁to ▁develop ▁technical ▁gu idel ines ▁in ▁the ▁mid - 1 9 9 0 s , ▁and ▁AS I , ▁UK SA , ▁C N ES , ▁D LR ▁and ▁E SA ▁signed ▁a ▁" Europe an ▁Code ▁of ▁Con duct " ▁in ▁ 2 0 0 6 , ▁ ▁which ▁was ▁a ▁prede cess or ▁standard ▁to ▁the ▁ISO ▁international ▁standard ▁work ▁that ▁would ▁begin ▁the ▁following ▁year . ▁In ▁ 2 0 0 8 , ▁E SA ▁further