Added proj 18001-09; projCRSs 31251-59 and 3416. For tfm 1619, amended tfm parameter dX from 577.3 to 577.326, dY from 90.1 to 90.129, dZ from 463.9 to 463.919 and dS from 2.42 to 2.4232 - see comment; added remarks to alias. For tfm 1618, in remarks referencing 1619 deleted "but to lesser precision ". For ProjCRS 31287 added supersession remarks. For projCRSs 31284-86 changed name. For projCRSs 31288-90 changed name and added remarks.