accession (ak-sesh-<<schwa>>n).1. The act of acceding or agreeing <the family’s accession

to  the  kidnapper’s  demands>.2.  A  coming  into  possession  of  a  right  or  office <as promised,  the

state’s budget was balanced within two years after the governor’s accession>.3.Int’l law. A method

by  which  a  nation  that  is  not  among  a  treaty’s  original  signatories  becomes  a  party  to  it  <Italy

became a party to the  nuclear-arms treaty by accession>. See  Vienna Convention on the Law of

Treaties, art. 15 (1155 U.N.T.S. 331, 8 I.L.M. 679 (1969)). — Also termed adherence; adhesion.

See  INSTRUMENT  OF  ACCESSION  .  4.  The  acquisition  of  title  to  personal  property  by

bestowing  labor  on  a  raw  material  to  convert  it  to  another  thing  <the  owner’s  accession  to  the

lumber produced from his land>. — Also termed (in Roman law) accessio. See ADJUNCTION(2).

[Cases: Accession    1. C.J.S. Accession §§ 2–8.]

“Accessio  is  the  combination  of  two  chattels  belonging  to  different  persons  into  a  single

article:  as  when  A’s  cloth  is  used  to  patch  B’s  coat,  or  a  vehicle  let  on  hire-purchase  has  new

accessories fitted to it.” R.F.V. Heuston, Salmond on the Law of Torts 113 (17th ed. 1977).

5. A property owner’s right to all that is added to the property (esp. land) naturally or by labor,

including  land  left  by  floods  and  improvements  made  by  others  <the  newly  poured  concrete

driveway  became  the  homeowner’s  property  by  accession>.  • In  Louisiana  law,  accession  is the

owner’s right to whatever is produced by or united with something, either naturally or artificially.

La. Civ. Code arts. 483, 490, 507. Cf.  ANNEXATION.  6.  An improvement to  existing  personal

property, such as new shafts on golf clubs.“The problem of accessions arises infrequently, judging

from reported cases, but an obvious instance of the difficulty arises where a motor vehicle is being

financed  by  a  secured  party  and  the  debtor  in  possession  of  necessity  acquires  a  new engine  or

new tires  for the  vehicle …. If the seller  of the engine  or tires reserved a security interest at the

time  the  goods  were  installed,  the  seller  should  prevail  over  the  vehicle’s  secured  party,  with  a

right to remove the accessions. Conversely, if the sale were on open credit with no security interest

reserved,  or  if  the  seller  acquired  a  security  interest  after  installation  of  the  goods,  then  the

financer of the vehicle should prevail.” Ray D. Henson, Handbook on Secured Transactions Under

the Uniform Commercial Code § 4-22, at 93 (2d ed. 1979).

7. The physical uniting  of  goods with  other goods in such a  manner that the identity of the

original goods is not lost. UCC § 9-102(a)(1).8.ACCESSORYSHIP. [Blacks Law 8th]