64. The Oslo C.or trission haa alao stualied article 60 of the Untted Natlonsconeention on the Lar of the sea whrch, lnter aria, reguires abandoned or ttlscararedoff-shore platforms to be rernoved in sucE-iGfaa to ensure safety of navlgati.on.taking lnto account any generally accep!€d intlrnational standard€ eatablished inthis regard by the competent rnternationar organizatlon. rt rlay be notear that thedefinition of dunping provi.ded for in articre r of the convencion on the Law of thesea includ€s deliberate disPosal of auch platforms nhereas the oglo conventlon doesnot expresal.y include such diEposal. The cbnmlsslon consldered, however, tbatslnce the provisl.ns of Annex rr to the os10 convention concern the dunping ofbulky saates and lhat the practlce is to lssue permits for auch aumping, it coultlbe concluded that the dumping of pr.atforns into the sea rdas rithin lts conpetence.rt thue agreed that all parties shourd consurt rrith their natlonar legar. experts asto ehetber the provisions of the osro convention coul.d be construed as conErorringthe dunping of platfornE or ehether a specifi.c anendneot is aleslrable. ttrecotmisslon agreed that it' concern' about future atisposar of platforms should araobe addresEed to the appropriat.e M body. The Oslo Comnission eilI take up theguestion of whether or not to prepare an a(plicit recoflnendation on the atisrnantllogand r emoval of platforms at its tselfth raeetlng ln 1986. 3. preveltion and control of marlne pollutlon fronland-baged aourcea 55. While narine pollut.ion from ships and fron atumplng at Bea are regulated btglobaL conventions and seseral regionat inetruments, marine pol-lutton ffomland-based sources is regulated only on a reglonal ba€ls (for example, ther9?4 Paris convention, the 19?6 Barcelona protocol andl the 19gl r.ima protocol).work at the globar revel was initiated by u!{Ep in r98l within the franework of itsprogralnue for the developnent and periodlc revie,t' of environmental ra!'. Baslcqueations have been addressed concerning the charlenge of ratentifying anat selectlngcriteria for deslgnating substances ehtch are potentlauy harmfur to the narineenvlronnent and cr{teria which shourct be used to areclde on ho,, such a sub'tancenight be managed in the marine environment. The ll6st favoured appsoach to ttate hagbeen a black/gret' llst approach. with respect to land-based sources, concerns overhon agreement can be reacbed on which substance. belong to whac li't has pronpte<tdetailed consideration of poesibre alternative approaches auch as eater-guaritycrlteria and aaslmllative capaclty. 66. ?he ad hoc Working croup of governnent-noninated experts seC up for lhepuEpose completed its uork on 19 April 1985 nith the adoption of the trMontreal Guiderines for the protection of the !,rarine Envrronment agalns! rrollutlon frolnr,and-Based sources'. These lnclude three technical annexes: strategies forprotecting, preserving and enhanclng the qual-ity of the marine environnenc,A/40/921 EngllBh Page 19 classification of substancesi Monitoring and data management. The Guidelines $ere prepared on the basis of conmon elenenta and principles drawn fron relevant existtng agreements (includlnq Part xII of the united Nations Convention on the Lalt of bhe Sea) , and drawlng upon experience qained in their preparation and inplementation. The ttNEP Governing Council, by clecision L3/L|/]f, encouraged 'rstates and international organizations to take the ltontreal Guidelineg lnto account ln che process of aleueloping bilateral, regional and, as appropriate'
**Analysis**
The text appears to be discussing environmental issues related to marine pollution and the management of offshore platforms, with a focus on international agreements and guidelines. It also touches on the development of a global framework for regulating marine pollution from land-based sources.

**Category**
Natural resources and environment, Science and technology