required elements ofsuchstatements. Theparties maysubmitwiththeirstatements alldocuments theyconsider toberelevant ormay add a reference tothedocuments orotherevidence theywillSUbmit. (2)Unlessotherwise agreed bytheparties, eitherpartymay amend orsupplement hisclaimordefence duringthecourseofthearbitral proceedings, unlessthe arbitral tribunal considers itinappropriate toallowsuchamendment havingregard tothedelayinmakingit. Article 24.Hearings andwritten proceedings (1)Subject toanycontrary agreement bytheparties, thearbitral tribunal shall decidewhether toholdoralhearings forthepresentation ofevidence orfororal argument, orwhether theproceedings shallbeconducted onthebasisofdocuments andothermaterials. However, unlesstheparties haveagreedthatnohearings shallbeheld,thearbitral tribunal shallholdsuchhearings atanappropriate stageoftheproceedings, ifsorequested by aparty. -87-(2) The parties shallbegivensufficient advance noticeofanyhearing andofany meeting ofthearbitral tribunal forthepurposes ofinspection ofgoods,other property ordocuments. (3)Allstatements, documents orotherinformation supplied tothearbitral tribunal byonepartyshallbecommunicated totheotherparty. Alsoanyexpert reportorevidentiary document onwhichthearbitral tribunal mayrelyinmaking itsdecision shallbecommunicated totheparties. Article 25.Default ofaparty Unlessotherwise agreed bytheparties, if,without showing sufficient cause, (a)theclaimant failstocommunicate hisstatement ofclaiminaccordance witharticle 23(1),thearbitral tribunal shallterminate theproceedings, (b)therespondent failstocommunicate hisstatement ofdefencein accordance witharticle 23(1),thearbitral tribunal shallcontinue the proceedings without treating suchfailure initselfasanadmission ofthe claimant's allegations, (c)anypartyfailstoappearatahearing ortoproduce documentary evidence, thearbitral tribunal maycontinue theproceedings and make the awardontheevidence beforeit. Article 26.Expertappointed byarbitral tribunal (1)Unlessotherwise agreed bytheparties, thearbitral tribunal (a) may appoint oneormoreexperts toreporttoitonspecific issuestobe determined bythearbitral tribunal, (b) may require apartytogivetheexpertanyrelevant information orto produce, ortoprovide accessto,anyrelevant documents, goodsorother property forhisinspection. (2)Unlessotherwise agreed bytheparties, ifapartysorequests orifthe arbitral tribunal considers itnecessary, theexpertshall,afterdelivery ofhis written ororalreport, participate inahearing wheretheparties havethe opportunity toputquestions tohim and topresent expertwitnesses inorderto testify onthepointsatissue. Article 27.Courtassistance intakingevidence Thearbitral tribunal orapartywiththeapproval ofthearbitral tribunal may request from acompetent courtofthisStateassistance intakingevidence. The courtmayexecute therequest withinitscompetence andaccording toitsruleson takingevidence. -88-CHAPTER VI.MAKING OFAWARDANDTERMINATION OFPROCEEDINGS Article 28.Rulesapplicable tosubstance ofdispute (1) The arbitral tribunal shalldecidethedispute inaccordance withsuchrules oflawasarechosen bytheparties asapplicable tothesubstance ofthedispute. Anydesignation ofthelaworlegalsystemofagivenStateshallbeconstrued, unlessotherwise expressed, asdirectly referring tothesubstantive lawofthat Stateandnottoitsconflict oflawsrules. (2)Failing anydesignation bytheparties, thearbitral tribunal shallapplythe lawdetermined bythecOnflict oflawsruleswhichitconsiders applicable. (3)Thearbitral tribunal shalldecide exaequoetbonoorasamiable compositeur onlyiftheparties haveexpressly authorized ittodoso. (4)Inallcases,thearbitral tribunal shalldecideinaccordance withtheterms ofthecontract andshalltakeintoaccount theusagesofthetradeapplicable tothetransaction. Article 29.Decision-making bypanelofarbitrators Inarbitral proceedings withmorethanonearbitrator, anydecision ofthearbitral tribunal shallbemade,unlessotherwise agreed bytheparties, by amajority of
**Analysis**
This text appears to be a set of rules or guidelines for arbitration proceedings, which is a legal process for resolving disputes between parties. The text discusses topics such as the submission of statements and documents, hearings, expert witnesses, and the making of an award. These topics are relevant to the field of law and international arbitration, but do not seem to be directly related to any specific sector or industry.

**Category**
International trade