<prompt> unaweza kugeuza matini haya ya swahilikwa kiingereza?mnamo 1969, mkataba ulibadilishwa kwa kiasi kikubwa kudhibiti utiririshaji wa maji ya ballast kutoka kwa tanker chini ya hali zifuatazo:  <response>: in 1969, the convention has been substantially amended, the amendments regulate preview ballast water discharge from the tanker when the following conditions are met: 