<OtherCosts>
		<OtherCost>
			<CostType></CostType>
			<Amount></Amount>
		</OtherCost>
	</OtherCosts>

private OtherCost[][] otherCostsField;
...

        [System.Xml.Serialization.XmlArrayItemAttribute(typeof(OtherCost), IsNullable=false)]
        public OtherCost[][] OtherCosts {
            get {
                return this.otherCostsField;
            }
            set {
                this.otherCostsField = value;
            }
        }

         <OtherCosts>
		<OtherCost>
			<CostType></CostType>
			<Amount></Amount>
		</OtherCost>
	</OtherCosts>

...
  <element name="OtherCosts" type="ncq:OtherCosts" minOccurs="0" maxOccurs="unbounded"/>
...

<complexType name ="OtherCosts">
    <annotation>
      <documentation>Collection of other costsd</documentation>
    </annotation>
    <sequence>
      <element name="OtherCost" type="ncq:OtherCost" minOccurs="1" maxOccurs="unbounded" />
    </sequence>
  </complexType>
  <complexType name ="OtherCost">
    <annotation>
      <documentation>Details of other cost</documentation>
    </annotation>
    <sequence>
      <element name="CostType" type="ncq:String15_1" minOccurs="1" />
      <element name="Amount" type="ncq:Currency" minOccurs="1" />
    </sequence>
  </complexType>